Soft coal seam roof bedding rock long drilling hole and multi-pump coordination fracturing permeation increasing method

• Main Authors: ZHAI HONG, GUAN JUNCAI, ZHOU JIANBIN, XIE FEI, LINGHU JIANSHE, ZHANG XIAOFENG, SHI XIAOHONG, YAN ZHIMING
• Format: Patent
• Language: Chinese; English
• Published: 20.06.2017
• 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

The invention relates to a soft coal seam roof bedding rock long drilling hole and multi-pump coordination fracturing permeation increasing method and belongs to the technical field of coal mines. By adoption of the soft coal seam roof bedding rock long drilling hole and multi-pump coordination fracturing permeation increasing method, construction is convenient, construction cost is low, gas treatment efficiency is effectively improved, and the engineering quantity of strip-shaped gas treatment roadways is decreased. By adoption of the technical scheme, operation is conducted according to the following steps that a, geological fine exploration is conducted, specifically, a detection hole is constructed along the roof of a target coal seam through a one thousand meter drilling machine and is subjected to full-hole sealing through cement mortar; b, positioning drilling is conducted through the one thousand meter drilling machine; c, drilling hole blocking is conducted, specifically, a fracturing hole is blocked