贺西矿底抽巷放水试验及矿井防治水技术探讨
2016-01-18刘德旺
·试验研究·
从事水文地质工作,(E-mail)sxjmzyb@163.com
贺西矿底抽巷放水试验及矿井防治水技术探讨
刘德旺1,2
(1.中国矿业大学 地球科学与测绘工程学院,北京100083;2.山西焦煤集团公司,山西太原030024)
摘要为查明贺西矿山西组4`#煤层开采受底板高承压太灰含水层的威胁,基于地下水径流理论,对太灰含水层进行了单孔放水试验,得出4`#煤底板太灰含水层的富水性和补给排泄条件。结果表明,太灰含水层岩溶发育且存在一定程度的不均一性,富水性差,地下水径流不畅,且地下水交替和循环条件滞缓,但有较高的水位,位于3`#、4`#煤层之上,有一定的危险性。在此基础上提出了该矿深部开采以疏水降压为主、注浆为辅的底板防治水技术措施,为保障山西组4`#煤安全开采提供了合理依据。
关键词深部开采;单孔放水试验;太灰水;防治水
收稿日期:2014-12-13
作者简介:刘德旺(1972—),男,山西平遥人,1996年毕业于山西矿业学院,2012级中国矿业大学(北京)在读硕士研究生,高级工程师,主要
中图分类号:TD745
文献标识码:B
文章编号:1672-0652(2015)01-0004-04
AbstractIn order to find out the threat of No.4 coal seam mining by high pressure the Archaean era limestone aquifer in Shanxi formation of Hexi coal mine, bases on the theory of groundwater flow, single hole drainage experiment on the Archaean era limestone aquifer is carried out, obtains the water abundance and the replenishment and drainage conditions of the Archaean era limestone aquifer in No.4 coal seam floor. The results show that the Archaean era limestone aquifer karst development has a certain degree of heterogeneity and the water abundance is poor, groundwater flow is slow, groundwater and cycling conditions are attenuate, but there is a high water level of which is above the coal seam of No.3 and No.4, there is a certain danger. On the basis puts forward the technical measures of floor water prevention and control, it provides the reasonable basis for guarantee safe mining of Shanxi formation No.4 coal seam.
贺西矿是山西焦煤汾西矿业(集团)有限责任公司的生产矿井,位于山西省河东煤田中段,离柳矿区西南部,离柳林县城12 km左右,矿区面积18.909 km2,属带压开采矿井。该矿主采二叠系山西组 3#、4#煤层,基本构造形态为一走向北西、倾向南西的单斜构造。随着矿井开采深度的增加,4#煤层底板承受水压加大,工作面底板最大承受水压为0.48~4.28 MPa,相应突水系数为0.017~0.151 MPa/m,井田内部分区域突水系数大于安全开采的临界值,当太灰水在遇到陷落柱以及其他地质构造与工作面导通时,有可能随采掘活动扰动进入工作面。……
