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根据我国现阶段水体下采煤理论及开采经验,系统地分析和研究了富煤一矿水体下采煤的技术及条件,通过对煤层覆岩条件及其防水特征研究后,认为本矿井的煤层覆岩条件和留设的防水安全煤岩柱特征均有利于水体下开采全部煤层,但地表破坏和覆岩破坏的沟通强度、采深采厚比值的研究结果显示,开采M_(15)号煤层以上的煤层是安全的,开采M_(15)号以下的煤层则需要在开采上部煤层时进行监控监测,以便采取适合本矿井的综合措施后确定能否开采。
According to the coal mining theory and mining experience under the current water body in our country, we systematically analyzed and studied the technology and conditions of coal mining under the first coal mine of rich coal. After studying the conditions and waterproof characteristics of overlying strata of coal seam, we think that the coal seam The overburden conditions and the features of the water-tight and safe coal-rock pillar are all conducive to the mining of all the coal seams under water. However, the research on the strength of communication between surface damage and overburden destruction and the ratio of mining thickness to mining depth shows that the coal seam M_ (15) The above coal seams are safe. The mining below M_ (15) requires monitoring and monitoring during the mining of the upper coal seams so as to determine whether the mining can be carried out after comprehensive measures suitable for this mine.