【摘要】：在現(xiàn)有煤柱合理結(jié)構(gòu)分區(qū)的基礎(chǔ)上,將其結(jié)構(gòu)分為塑性區(qū)、彈性核區(qū)、水壓破壞區(qū)。為求得各區(qū)寬度,首先,應(yīng)用極限平衡理論和拋物線型強(qiáng)度理論,采用分離變量法確定了塑性區(qū)寬度;考慮礦壓、水壓作用,選用統(tǒng)一強(qiáng)度理論,采用半逆解法,確定了彈性核區(qū)寬度;考慮水的浸潤軟化作用,確定了水壓破壞區(qū)寬度。之后,通過與以往經(jīng)典模型各分區(qū)計算公式對比,驗證了模型的合理性。最后,通過超聲波探測技術(shù),測量了煤柱內(nèi)部的物理形態(tài)分布,驗證了模型的正確性,并將研究成果應(yīng)用于董家河煤礦防水隔離煤柱設(shè)計中,為煤礦安全高效生產(chǎn)提供了理論依據(jù)。
[Abstract]:On the basis of the reasonable partition of the existing coal pillar structure, the structure is divided into plastic zone, elastic core zone and hydraulic failure zone. In order to obtain the width of each zone, the limit equilibrium theory and the parabolic strength theory are applied to determine the width of the plastic zone by using the method of separating variables, and the unified strength theory and the semi-inverse method are used to determine the width of the plastic zone, considering the effect of rock pressure and water pressure. The width of elastic core zone is determined, and the width of water pressure failure zone is determined considering the effect of water soakage and softening. After that, the rationality of the model is verified by comparing with the classical models. Finally, the physical distribution of coal pillar is measured by ultrasonic detection technology, and the correctness of the model is verified, and the research results are applied to the design of waterproof and isolated coal pillar in Dongjiahe coal mine. It provides a theoretical basis for the safe and efficient production of coal mines.
【作者單位】： 西安科技大學(xué)理學(xué)院;中煤科工集團(tuán)西安研究院有限公司水文地質(zhì)研究所;
【基金】：國家自然科學(xué)基金資助項目(41272340)~~
【分類號】：TD745;TD822.3
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本文編號：2259960