發(fā)布時間：2018-06-03 10:48

  本文選題：急傾斜特厚煤層 + 煤巖沖擊性��； 參考：《西安科技大學(xué)》2017年碩士論文

【摘要】：急傾斜特厚煤層安全高效開采過程中以煤巖沖擊性為主的動力災(zāi)害是煤礦安全生產(chǎn)面臨的重要難題之一。伴隨著開采深度的加深和開采擾動的影響,煤巖沖擊性災(zāi)害的發(fā)生機制十分復(fù)雜,對其有效的監(jiān)測和預(yù)防也比較困難。而單一的監(jiān)測手段與防治技術(shù)又不能準(zhǔn)確的達(dá)到監(jiān)測防治的效果,多手段的聯(lián)合監(jiān)測與不同的防治措施可以更為科學(xué)準(zhǔn)確的監(jiān)測和防治煤巖沖擊性災(zāi)害。針對神華新疆能源有限公司烏東煤礦南采區(qū)特殊的地質(zhì)情況和該礦發(fā)生的具體的煤巖沖擊性災(zāi)害的典型事故,對急傾斜特厚煤層綜放開采工作面煤巖沖擊性災(zāi)害的發(fā)生機制、監(jiān)測方法及防治措施展開研究。由于特殊的煤巖賦存結(jié)構(gòu),烏東礦南采去工作面煤巖沖擊性災(zāi)害的致災(zāi)主要是由于B2-B3巖柱引起,經(jīng)過具體的開采實踐及理論研究,認(rèn)為巖柱的“撬動”是導(dǎo)致煤巖沖擊性災(zāi)害的關(guān)鍵,為此提出運用巖柱“撬動”理論分析煤巖沖擊性致災(zāi)機理。聯(lián)合監(jiān)測主要是以微震+地音在線監(jiān)測為主,電磁輻射+鉆屑法監(jiān)測為輔的監(jiān)測手段,在綜采工作面及掘進(jìn)工作面巷道內(nèi)分別布置監(jiān)測探頭在線實時監(jiān)測,對監(jiān)測異常區(qū)域在實施電磁輻射和鉆屑監(jiān)測加以驗證,從而達(dá)到有效的監(jiān)測,避免了由于煤層賦存的多樣性和復(fù)雜性,并受空間尺寸大型化及現(xiàn)場監(jiān)測中外界的干擾等因素的影響,造成監(jiān)測結(jié)果的失真。根據(jù)聯(lián)合監(jiān)測結(jié)果的分析,對煤巖沖擊性危險區(qū)域?qū)嵤┙馕?在綜放工作面主要對B2-B3巖柱實施注水爆破,對煤層頂?shù)装鍖嵤┦㈤_爆破,對煤體實施注水軟化;在掘進(jìn)面主要采用大直徑卸壓和開槽卸壓,對特殊區(qū)域?qū)嵤┘訌娭ёo(hù)、煤層注水及爆破等措施,達(dá)到降低或阻礙煤巖應(yīng)力的集中,從而有效的防治煤巖沖擊性災(zāi)害的發(fā)生。本文的研究成果對于急傾斜特厚煤層綜放開采工作面煤巖沖擊性動力災(zāi)害的監(jiān)測與防治具有一定的指導(dǎo)意義,同時對于類似地質(zhì)條件的礦井開采中煤巖動力災(zāi)害也有一定的借鑒意義。
[Abstract]:In the process of safety and high efficiency mining of steeply inclined and super thick coal seam, the dynamic disaster, which is dominated by coal and rock impact, is one of the important problems in the safe production of coal mine. With the deepening of mining depth and the influence of mining disturbance, the mechanism of coal rock impact disaster is very complex, and it is difficult to monitor and prevent it effectively. But the single monitoring means and prevention technology can not accurately achieve the effect of monitoring prevention and control, multi-means of joint monitoring and different prevention and control measures can be more scientific and accurate monitoring and prevention of coal and rock impact disasters. In view of the special geological conditions in the south mining area of Wudong Coal Mine of Shenhua Xinjiang Energy Co., Ltd., and the typical accidents of specific coal and rock impact disasters occurring in this mine, the mechanism of coal and rock impact disasters in fully-mechanized top-coal caving mining face of steeply inclined and extra thick coal seam is discussed. Monitoring methods and prevention measures were studied. Due to the special coal and rock occurrence structure, the impact disaster of coal and rock in the south mining face of Wudong Coal Mine is mainly caused by the B2-B3 rock pillar, which has been studied by concrete mining practice and theory. It is considered that the "crowing" of rock pillar is the key to the impact disaster of coal and rock. Therefore, the theory of rock pillar "crowing" is proposed to analyze the mechanism of coal and rock impact disaster. The joint monitoring is mainly based on the on-line monitoring of microseismic ground sound, supplemented by the electromagnetic radiation drilling method, and the monitoring probe is placed in the roadway of the fully mechanized mining face and the tunneling face in real time on line, respectively. In order to achieve effective monitoring and avoid the diversity and complexity due to the diversity and complexity of coal seam occurrence, the electromagnetic radiation and drilling debris monitoring in monitoring abnormal areas is verified. It is also affected by the large size of space and the external interference in the field monitoring, which results in the distortion of the monitoring results. According to the analysis of the joint monitoring results, the dangerous area of coal and rock impact is solved, the B2-B3 rock pillar blasting is mainly carried out in the fully mechanized caving face, the roof and floor of the coal seam is blasted, and the water injection softening of the coal body is carried out. In order to reduce or hinder the stress concentration of coal and rock, large diameter pressure relief and slotted pressure relief are mainly used to strengthen support, water injection in coal seam and blasting to prevent the occurrence of coal rock impact disaster effectively. The research results of this paper have certain guiding significance for the monitoring and prevention of coal and rock impact dynamic disasters in fully-mechanized top-coal caving face of steeply inclined and extra thick coal seam. At the same time, it can also be used for reference for coal and rock dynamic disasters in mine mining with similar geological conditions.
【學(xué)位授予單位】：西安科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TD324

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本文編號：1972514