【摘要】：為研究非充分采動(dòng)下淺埋堅(jiān)硬頂板"兩帶"高度,防止工作面開(kāi)采過(guò)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(chǎng)觀測(cè)及數(shù)值模擬,對(duì)趙屋煤礦采空區(qū)上覆巖層"兩帶"高度進(jìn)行了研究,揭示了非充分采動(dòng)下淺埋深堅(jiān)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(dòng)下淺埋深堅(jiān)硬頂板"兩帶"高度低于充分采動(dòng),采寬26 m時(shí)裂采比為7.65;導(dǎo)水裂隙帶的高度整體呈階梯型變化,一個(gè)階段到下一個(gè)階段都以突跳方式進(jìn)入;非充分采動(dòng)條件下,"三下采煤規(guī)程"中"兩帶"計(jì)算公式及傳統(tǒng)經(jīng)驗(yàn)值18~28倍裂采比在應(yīng)用時(shí)需考慮采動(dòng)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(xué)能源科學(xué)與工程學(xué)院;煤炭安全生產(chǎn)河南省協(xié)同創(chuàng)新中心;
【基金】：國(guó)家自然科學(xué)基金重點(diǎn)項(xiàng)目(U1261206);國(guó)家自然科學(xué)基金項(xiàng)目(51374092)
【分類號(hào)】：TD327.2

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