Recently, the "one-hole multi-purpose" technology of directional long drilling segmented hydraulic fracturing of CCTEG Xi'an Research Institute is once again ushering in a new breakthrough. The innovative breakthrough of this technology provides an effective way to reduce the impact of rock burst, high gas, water, fire and other disasters in Binchang mining area.
For a long time, Binchang mining area has been deeply affected by four major disasters, such as rock burst, high gas, water and fire. The disaster management project has heavy tasks, large personnel input and high project cost. In order to achieve the goal of cost reduction and efficiency increase and multi-disaster coordinated management, CCTEG Xi'an Research Institute has responded to the needs of miners at once, combined with years of engineering experience, actively carried out technical research, upgraded and optimized the existing directional long drilling segmented hydraulic fracturing technology, and finally formed the collaborative management technology of rock burst and gas advance area.
Through the construction of directional drilling and hydraulic fracturing, the risk of rock burst is reduced; At the same time, the coal seam gas enters the extraction pipeline along the crack of the roof to realize efficient gas extraction.
This technology has achieved remarkable results in the application practice of Hujiahe mine 401106 working face in Bingchang mining area. At present, it has been successfully extracted through the fracturing area. Monitoring data shows that the pure extraction volume of the roof drilling is 2-3 times higher than that of the traditional gas extraction hole, and the energy and stress of the working face are reduced by 20%-30%, effectively reducing the impact risk. Field practice has proved that hydraulic fracturing technology can realize the collaborative prevention and control of rock burst pressure, water and gas, and achieve the purpose of coal seam permeability improvement, dust reduction, and improvement of lump coal rate in the drilling along the coal seam, and truly realize the goal of "multiple use of one hole, cost reduction and efficiency increase".
