Monitor study on broken floor depth caused by underground pressure
Monitor study on broken floor depth caused by underground pressure
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发表时间：
2004
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通讯作者：
Shi Long-qing
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作者：
Shi Long-qing
只有有效隔水层才具有隔水能力。肥城煤田目前约有61%的煤炭储量在开采过程中存在底板奥陶系岩溶水突水的危险。因此，对底板破坏深度进行监测是肥城煤田矿井水灾害防治的主要研究课题。选取肥城煤田曹庄煤矿正在开采的8号煤层和9号煤层作为监测对象。可以用输液法监测破损地板。利用专利技术“双端密封失水仪”可监测采前地层原始破裂程度和矿压破坏深度。研究结果表明：8煤层开采引起的底板破坏深度为36.5m，9煤层开采引起的底板破坏深度为14.2m。
Only the effective water-resisting zone has water-resisting capacity. At present about 61 percent coal reserve in Feicheng coal field is suffering the danger of water-inrush from floor Ordovician karst water while it is mined. Therefore monitor the broken floor depth is a main research project of controlling mine inundation in Feicheng coal field. The being mined coal seam 8 and coal seam 9 of Caozhuang coal mine in Feicheng coal field is selected as the monitor objects. The broken floor can be monitored with infusion method. The stratum original fracture degree before mining coal and broken depth caused by underground pressure can be monitored with the patent ‘Double Ends Sealed Water-loss Monitor’. The research result show that the depth of the broken floor caused by mining coal seam 8 is 36.5 m and the depth of the broken floor caused by mining coal seam 9 is 14.2 m.