【摘要】：針對(duì)淺埋強(qiáng)沖擊危險(xiǎn)區(qū)靜載荷高度集中、無頂板活動(dòng)就面臨沖擊危險(xiǎn)的特征,以古山煤礦為例,確定其沖擊地壓發(fā)生類型為集中靜載荷主導(dǎo)型,對(duì)集中靜載荷采用地震CT技術(shù)、數(shù)值模擬、現(xiàn)場(chǎng)實(shí)測(cè)等方法開展了分步評(píng)價(jià),分步驅(qū)散,聯(lián)合檢驗(yàn)。結(jié)果表明:淺埋厚硬單層巖漿巖頂板提供集中靜載荷,本次沖擊地壓無動(dòng)載荷參與,沖擊地壓監(jiān)測(cè)應(yīng)以監(jiān)控靜載荷為主;據(jù)采前地震CT探測(cè)結(jié)果揭示沖擊發(fā)生后,仍然存在靜載荷高度集中區(qū)域;開采過程中靜載荷實(shí)時(shí)監(jiān)測(cè)與數(shù)值模擬揭示的強(qiáng)沖擊危險(xiǎn)區(qū)相吻合,微震、地音監(jiān)測(cè)技術(shù)提供的動(dòng)載荷信息檢驗(yàn)了靜載荷監(jiān)測(cè)結(jié)果,表明工作面推進(jìn)中頂板未垮斷,高集中靜載荷導(dǎo)致底板、煤層破裂。
[Abstract]:In view of the characteristics that the static load is highly concentrated in shallow buried strong impact danger area and there is no roof movement facing impact hazard, taking Gushan coal mine as an example, the occurrence type of impact ground pressure is determined to be concentrated static load leading type, and seismic CT technique is used for concentrated static load. Numerical simulation, field measurement and other methods are carried out step by step evaluation, step by step dispersal and joint inspection. The results show that the shallow buried thick hard monolayer magmatic roof provides concentrated static load, and there is no dynamic load in the impact ground pressure, and monitoring static load should be the main monitoring method for the impact ground pressure monitoring. According to the pre-mining seismic CT survey results, there is still a high concentration area of static load after the impact occurred. The real time monitoring of static load in mining process coincides with the strong impact risk area revealed by numerical simulation. The dynamic load information provided by micro-earthquake and ground-sound monitoring technology has verified the results of static load monitoring, which indicates that the roof in the working face has not broken down. High concentrated static load leads to floor and coal seam rupture.
【作者單位】： 煤炭科學(xué)研究總院開采設(shè)計(jì)研究分院;天地科技股份有限公司開采設(shè)計(jì)事業(yè)部;
【基金】：國(guó)家自然科學(xué)基金煤炭聯(lián)合基金資助項(xiàng)目(U1261211) 天地科技開采生產(chǎn)力轉(zhuǎn)化基金資助項(xiàng)目(KJ-2015-TDKC-05)
【分類號(hào)】：TD324

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