非充分采動下淺埋堅硬頂板“兩帶”高度分析
發(fā)布時間：2019-05-08 23:45
【摘要】：為研究非充分采動下淺埋堅硬頂板"兩帶"高度,防止工作面開采過程中出現(xiàn)潰水、潰砂等安全事故,結(jié)合趙屋煤礦地質(zhì)采礦條件,采用地表鉆孔沖洗液漏失量現(xiàn)場觀測及數(shù)值模擬,對趙屋煤礦采空區(qū)上覆巖層"兩帶"高度進行了研究,揭示了非充分采動下淺埋深堅硬頂板"兩帶"高度及其變化規(guī)律。研究結(jié)果表明:非充分采動下淺埋深堅硬頂板"兩帶"高度低于充分采動,采寬26 m時裂采比為7.65;導水裂隙帶的高度整體呈階梯型變化,一個階段到下一個階段都以突跳方式進入;非充分采動條件下,"三下采煤規(guī)程"中"兩帶"計算公式及傳統(tǒng)經(jīng)驗值18~28倍裂采比在應用時需考慮采動的充分性。
[Abstract]:In order to study the height of "two zones" of shallow-buried hard roof under inadequate mining and prevent water-breaking and sand-breaking accidents in working face, combined with the geological and mining conditions of Zhaowu coal mine, Based on the field observation and numerical simulation of surface drilling flushing fluid leakage, the height of "two zones" of overlying strata in goaf of Zhaowu Coal Mine is studied, and the height and variation law of "two zones" of shallow buried and deep hard roof under incomplete mining are revealed. The results show that the height of "two zones" of shallow buried hard roof is lower than that of full mining, and the ratio of crack to production is 7.65 when the width of mining is 26 m. The height of the water-conducting fracture zone changes step-by-step as a whole, from one stage to the next stage, the height of the water-conducting fracture zone is entered by sudden jump. Under the condition of insufficient mining, the calculation formula of "two zones" and the traditional experience value of 1828 times crack ratio in "three coal mining regulations" need to consider the adequacy of mining in application.
【作者單位】： 河南理工大學能源科學與工程學院;煤炭安全生產(chǎn)河南省協(xié)同創(chuàng)新中心;
【基金】：國家自然科學基金重點項目(U1261206);國家自然科學基金項目(51374092)
【分類號】：TD327.2
本文編號：2472315
[Abstract]:In order to study the height of "two zones" of shallow-buried hard roof under inadequate mining and prevent water-breaking and sand-breaking accidents in working face, combined with the geological and mining conditions of Zhaowu coal mine, Based on the field observation and numerical simulation of surface drilling flushing fluid leakage, the height of "two zones" of overlying strata in goaf of Zhaowu Coal Mine is studied, and the height and variation law of "two zones" of shallow buried and deep hard roof under incomplete mining are revealed. The results show that the height of "two zones" of shallow buried hard roof is lower than that of full mining, and the ratio of crack to production is 7.65 when the width of mining is 26 m. The height of the water-conducting fracture zone changes step-by-step as a whole, from one stage to the next stage, the height of the water-conducting fracture zone is entered by sudden jump. Under the condition of insufficient mining, the calculation formula of "two zones" and the traditional experience value of 1828 times crack ratio in "three coal mining regulations" need to consider the adequacy of mining in application.
【作者單位】： 河南理工大學能源科學與工程學院;煤炭安全生產(chǎn)河南省協(xié)同創(chuàng)新中心;
【基金】：國家自然科學基金重點項目(U1261206);國家自然科學基金項目(51374092)
【分類號】：TD327.2
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