Multifunctional connecting bridging agent

The invention discloses a multifunctional connecting bridging agent comprising the following materials in parts by weight: 30-40 parts of cotton petals, 10-20 parts of furfural, 10-20 parts of corn stalk cores, 5-10 parts of purpose-made wooden meals and 5-10 parts of cotton barks. The multifunctional connecting bridging agent is prepared by uniformly stirring and mixing the materials in parts byweight by a conventional preparation method. The invention has the advantages of extensive material sources, no toxin or pollution, simple and convenient construction technology, good connection property in a large crack, a large karst cave, a subterranean river and a serious voided leaking layer of a stratum, large net forming area, high bridging capability, and the like and is widely used in oiland geological exploration technologies and especially suitable for the plugging construction of the large crack, the large karst cave, the subterranean river and the serious voided stratum.