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- deep mining of coal pillar 深部开采
- The stability of coal pillar of the short-wall mining was analyzed systemically by numerical simulation with the rock failure process analysis software (RFPA2D). 采用岩石破裂过程分析软件RFPA2D系统,对短壁机械化开采的煤柱稳定性进行数值计算与分析。
- The extraction of coal from these deep mines is expensive. 从这些深矿中取得煤是很昂贵的。
- Put forward redistribution of stress in the mining area and Domino effect caused by unstability of coal pillar underground, resulting in sudden roof caving in the gob and surface subsidence. 提出了采场内煤柱失稳破坏引起采场应力重新分布,出现煤柱群连续失稳破坏的多米诺效应,从而导致采空区顶板大面积突然垮落和地表整体塌陷。
- And then studied the area channel flowed along and destructiveness to the coal seam, provide a reference for the mining of coal seam 8 in middle to deep part of the minefield. 并对古河流的流经区域和煤层的破坏程度作了研究,为井田中深部八煤层的开采提供了参考依据。
- The mechanical model of key strata supported by coal pillar is set up according to the layout of coal pillars in the coalface of short wall mining. 根据短壁开采条件下保护煤柱的布设特点,建立由保护煤柱支承的关键层力学分析模型。
- The roof rock was assumed in the elastic state,established the mechanical model of coal pillar and roof system. 假设顶板岩层处于弹性工作状态情况下,建立了煤柱-顶板系统的力学模型。
- The results indicate that the width of coal pillar has a great influence on the stress distribution of the gob-side entry. 研究表明:留设煤柱的宽度对孤岛面沿空巷道的应力分布有较大影响;
- When the destabilization of the coal pillar occurred, it needs much more strength of coal pillar to restore to the steady state than that when destroying. 煤柱一旦失稳,如要使其恢复到稳定状态,需要的煤柱强度要比煤柱破坏时的强度大的多;
- The mining of shallow coal bed in Shenfu Mine is seriously threatened by suffosion hazard of coal shaft. 神府矿区浅部煤层开采受到矿井溃砂的严重威胁。
- He's mine of information about insects. 他在昆虫方面有着渊博的知识。
- My neighbor is a mine of information about history. 我的一位邻居历史知识十分渊博。
- It is indicated that the span and flexural stiffness of cavern roof, the dimension and brittleness of coal pillar, the uniformity of coal material and the size of mineral grain are the important factors influencing rock burst of coal pillar. 分析表明,顶板的跨径、顶板的抗弯刚度、煤柱的尺寸、谋柱的脆性、煤岩材料的均匀性和矿物颗粒的大小是煤柱岩爆的重要影响因素。
- A good encyclopaedia is a mine of information. 一部好的百科全书是一座知识宝库。
- Law and influence factors of rock bump occurred in coal mining of deep mine 矿井深部开采冲击地压发生的规律及影响因素
- The displacement angle of strata has a great bearing on the size of coal pillar for protection of buildings on very thick unconsolidated layers,and has a great economic potentials. 地层移动角参数对巨厚松散层矿井的建筑物保护煤柱尺寸影响很大,经济潜力十分巨大。
- My grandmother is a mine of information about our family's history. 我的祖母是我们家史的资料库。
- We need to replenish our stocks of coal. 我们需要再次补充煤的储备。
- Because of the mining of coal, the aquifer structure is destroied, the change of hydrologic cycle occurs, and the hydrochemistrical factes have a lack of balance. 煤炭资源的开发、加工和使用又对自然环境造成改变和破坏,其原因在于煤矿开采时含水层结构被破坏、水循环规律发生改变以及水化学相平衡失调,使水环境发生变化。
- Prohibition was laid on the export of coal. 禁止煤炭输出。