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目前肥城煤田 6 1%的煤炭储量受底板奥陶系灰岩岩溶水威胁 ,采场底板破坏深度的监测是该煤田底板水害防治的重要内容 ,选择肥城煤田曹庄井田 8煤层和 9煤层开采作为监测对象 ,利用向底板岩层注水方法监测岩层破坏情况。利用专利产品“钻孔双端封堵测漏监测仪” ,监测煤层采前的底板原始裂隙发育程度和采后矿山压力底板的破坏深度。监测结果表明 ,8煤层开采造成的底板破坏深度可达 36 .5m ;9煤层开采底板破坏深度可达 14 .2m。
At present, 61% of the coal reserves in Feicheng Coalfield are threatened by the bottom plate of Ordovician limestone karst water. The monitoring of the depth of stope floor destruction is an important part of the prevention and treatment of the floor water hazards in the coalfield. The 8th coal seam and 9th coal seam of Caozhuang Minefield in Feicheng Coalfield are selected as Monitoring objects, the use of floor rock water injection method to monitor the destruction of rock. Using the patented product “borehole double-ended plugging leak detector” to monitor the original coal seam floor before the mining of the original crack development and post-mining mine floor depth of destruction. The monitoring results show that the depth of floor damage caused by 8 coal seam mining can reach 36.5m, and the depth of destruction of 9 coal seam mining floor can reach 14.2m.