Method for measuring effective coal-mine gas extraction radius
The invention provides a method for measuring an effective coal-mine gas extraction radius. The method comprises the following steps: an extraction drilling hole is formed in a coal wall; two observation holes are formed in the two sides of the extraction drilling hole, wherein the distances between...
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| creator | LI FENGMEI SHI JIANXIN PAN RUIQING ZHANG HONG SONG WENYI PENG JIANGUO SUN JINGLAI MA XUEQIN WANG BIN ZHOU LIANCHUN LI GUANGYING LI XIANG WANG ZHONGMIAN YANG YINGCHAO |
| description | The invention provides a method for measuring an effective coal-mine gas extraction radius. The method comprises the following steps: an extraction drilling hole is formed in a coal wall; two observation holes are formed in the two sides of the extraction drilling hole, wherein the distances between the two observation holes and the extraction drilling hole are different; gas extraction is performed on the extraction hole; gas pressure reduction conditions of the two observation holes are monitored periodically; the range of the effective coal-mine gas extraction radius is reduced in a halving manner until the effective coal-mine gas extraction radius is determined. With adoption of the method provide by the invention, the effective coal-mine gas extraction radius can be rapidly measured, damage to integrity of a coal body can be reduced and the accuracy of a measurement result can be improved. |
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The method comprises the following steps: an extraction drilling hole is formed in a coal wall; two observation holes are formed in the two sides of the extraction drilling hole, wherein the distances between the two observation holes and the extraction drilling hole are different; gas extraction is performed on the extraction hole; gas pressure reduction conditions of the two observation holes are monitored periodically; the range of the effective coal-mine gas extraction radius is reduced in a halving manner until the effective coal-mine gas extraction radius is determined. With adoption of the method provide by the invention, the effective coal-mine gas extraction radius can be rapidly measured, damage to integrity of a coal body can be reduced and the accuracy of a measurement result can be improved.</description><language>eng</language><subject>EARTH DRILLING ; EARTH DRILLING, e.g. DEEP DRILLING ; FIXED CONSTRUCTIONS ; MINING ; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS ; SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS</subject><creationdate>2015</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150218&DB=EPODOC&CC=CN&NR=104358559A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,776,881,25542,76289</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=20150218&DB=EPODOC&CC=CN&NR=104358559A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>LI FENGMEI</creatorcontrib><creatorcontrib>SHI JIANXIN</creatorcontrib><creatorcontrib>PAN RUIQING</creatorcontrib><creatorcontrib>ZHANG HONG</creatorcontrib><creatorcontrib>SONG WENYI</creatorcontrib><creatorcontrib>PENG JIANGUO</creatorcontrib><creatorcontrib>SUN JINGLAI</creatorcontrib><creatorcontrib>MA XUEQIN</creatorcontrib><creatorcontrib>WANG BIN</creatorcontrib><creatorcontrib>ZHOU LIANCHUN</creatorcontrib><creatorcontrib>LI GUANGYING</creatorcontrib><creatorcontrib>LI XIANG</creatorcontrib><creatorcontrib>WANG ZHONGMIAN</creatorcontrib><creatorcontrib>YANG YINGCHAO</creatorcontrib><title>Method for measuring effective coal-mine gas extraction radius</title><description>The invention provides a method for measuring an effective coal-mine gas extraction radius. The method comprises the following steps: an extraction drilling hole is formed in a coal wall; two observation holes are formed in the two sides of the extraction drilling hole, wherein the distances between the two observation holes and the extraction drilling hole are different; gas extraction is performed on the extraction hole; gas pressure reduction conditions of the two observation holes are monitored periodically; the range of the effective coal-mine gas extraction radius is reduced in a halving manner until the effective coal-mine gas extraction radius is determined. With adoption of the method provide by the invention, the effective coal-mine gas extraction radius can be rapidly measured, damage to integrity of a coal body can be reduced and the accuracy of a measurement result can be improved.</description><subject>EARTH DRILLING</subject><subject>EARTH DRILLING, e.g. DEEP DRILLING</subject><subject>FIXED CONSTRUCTIONS</subject><subject>MINING</subject><subject>OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS</subject><subject>SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>2015</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZLDzTS3JyE9RSMsvUshNTSwuLcrMS1dITUtLTS7JLEtVSM5PzNHNzcxLVUhPLFZIrSgpSgRK5OcpFCWmZJYW8zCwpiXmFKfyQmluBkU31xBnD93Ugvz41OKCxOTUvNSSeGc_QwMTY1MLU1NLR2Ni1AAAX54wsg</recordid><startdate>20150218</startdate><enddate>20150218</enddate><creator>LI FENGMEI</creator><creator>SHI JIANXIN</creator><creator>PAN RUIQING</creator><creator>ZHANG HONG</creator><creator>SONG WENYI</creator><creator>PENG JIANGUO</creator><creator>SUN JINGLAI</creator><creator>MA XUEQIN</creator><creator>WANG BIN</creator><creator>ZHOU LIANCHUN</creator><creator>LI GUANGYING</creator><creator>LI XIANG</creator><creator>WANG ZHONGMIAN</creator><creator>YANG YINGCHAO</creator><scope>EVB</scope></search><sort><creationdate>20150218</creationdate><title>Method for measuring effective coal-mine gas extraction radius</title><author>LI FENGMEI ; SHI JIANXIN ; PAN RUIQING ; ZHANG HONG ; SONG WENYI ; PENG JIANGUO ; SUN JINGLAI ; MA XUEQIN ; WANG BIN ; ZHOU LIANCHUN ; LI GUANGYING ; LI XIANG ; WANG ZHONGMIAN ; YANG YINGCHAO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_CN104358559A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>2015</creationdate><topic>EARTH DRILLING</topic><topic>EARTH DRILLING, e.g. DEEP DRILLING</topic><topic>FIXED CONSTRUCTIONS</topic><topic>MINING</topic><topic>OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS</topic><topic>SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS</topic><toplevel>online_resources</toplevel><creatorcontrib>LI FENGMEI</creatorcontrib><creatorcontrib>SHI JIANXIN</creatorcontrib><creatorcontrib>PAN RUIQING</creatorcontrib><creatorcontrib>ZHANG HONG</creatorcontrib><creatorcontrib>SONG WENYI</creatorcontrib><creatorcontrib>PENG JIANGUO</creatorcontrib><creatorcontrib>SUN JINGLAI</creatorcontrib><creatorcontrib>MA XUEQIN</creatorcontrib><creatorcontrib>WANG BIN</creatorcontrib><creatorcontrib>ZHOU LIANCHUN</creatorcontrib><creatorcontrib>LI GUANGYING</creatorcontrib><creatorcontrib>LI XIANG</creatorcontrib><creatorcontrib>WANG ZHONGMIAN</creatorcontrib><creatorcontrib>YANG YINGCHAO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>LI FENGMEI</au><au>SHI JIANXIN</au><au>PAN RUIQING</au><au>ZHANG HONG</au><au>SONG WENYI</au><au>PENG JIANGUO</au><au>SUN JINGLAI</au><au>MA XUEQIN</au><au>WANG BIN</au><au>ZHOU LIANCHUN</au><au>LI GUANGYING</au><au>LI XIANG</au><au>WANG ZHONGMIAN</au><au>YANG YINGCHAO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>Method for measuring effective coal-mine gas extraction radius</title><date>2015-02-18</date><risdate>2015</risdate><abstract>The invention provides a method for measuring an effective coal-mine gas extraction radius. The method comprises the following steps: an extraction drilling hole is formed in a coal wall; two observation holes are formed in the two sides of the extraction drilling hole, wherein the distances between the two observation holes and the extraction drilling hole are different; gas extraction is performed on the extraction hole; gas pressure reduction conditions of the two observation holes are monitored periodically; the range of the effective coal-mine gas extraction radius is reduced in a halving manner until the effective coal-mine gas extraction radius is determined. With adoption of the method provide by the invention, the effective coal-mine gas extraction radius can be rapidly measured, damage to integrity of a coal body can be reduced and the accuracy of a measurement result can be improved.</abstract><oa>free_for_read</oa></addata></record> |
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| subjects | EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS MINING OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, ORDRAINING IN OR OF MINES OR TUNNELS |
| title | Method for measuring effective coal-mine gas extraction radius |
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