东欢坨矿-950 m水平石门揭煤瓦斯基础参数测试及抽采实践

Test of Basic Parameters of Coal and Gas Exposed by-950 Horizontal Crosscut in Donghuantuo Mine and Its Drainage Practice

东欢坨矿延深至-950 m水平后,煤层瓦斯含量、压力逐步增大,瓦斯灾害风险较大。为了解决新水平石门揭煤安全问题,自主设计研发上仰瓦斯压力测试钻孔补偿式不泄压装置和高压注浆二次封堵工艺,创新性地解决了测压过程遇到的封孔以及承压水干扰的问题,合理设计瓦斯综合治理方案,安全高效的完成了新水平石门揭煤工作,为矿井后续其他煤层的揭煤和瓦斯治理奠定了坚实的理论和实践基础。

After Donghuantuo Coal Mine is extended to the-950 level, the gas content and pressure in the coal seam gradually increase, and the risk of gas disaster is high. In order to solve the safety problem of coal uncovering in the new horizontal crosscut, we independently designed and developed a compensated non pressure relief device for upward gas pressure test boreholes and a secondary plugging process of high-pressure grouting, innovatively solved the problems of hole sealing and confined water interference encountered in the pressure measurement process, rationally designed a comprehensive gas control program, and completed the coal uncovering in the new horizontal crosscut safely and efficiently. It has laid a solid theoretical and practical foundation for the subsequent coal seam uncovering and gas control in other coal seams.