本文選題：采場參數(shù) + 石灰?guī)r礦�。� 參考：《重慶科技學(xué)院》2015年碩士論文

【摘要】：我國是世界上石灰?guī)r資源非常豐富的國家之一，目前全國正在生產(chǎn)的石灰?guī)r地下礦山企業(yè)數(shù)量較多，但大多數(shù)礦山屬于民采民運，不僅礦山開采規(guī)模較小、生產(chǎn)技術(shù)落后，而且隨著開采時間的延長和開采范圍的擴大，原有的經(jīng)驗對地應(yīng)力的處理考慮不周全，導(dǎo)致礦房采場參數(shù)取值不合理，嚴重影響到礦山生產(chǎn)的安全、經(jīng)濟及高效。目前重慶市石灰?guī)r地下礦山主要集中在大足、榮昌等區(qū)縣，主要采用房柱法開采，手持式鉆機打眼，爆破落礦，小型挖掘機或者裝載機裝礦，采場內(nèi)采用汽車運輸。大多數(shù)礦山采用留置石灰?guī)r護頂層的房柱法生產(chǎn)，在開采石灰?guī)r地下礦山中選取設(shè)計合理的采場參數(shù)很重要，不僅可以確保頂板穩(wěn)定不發(fā)生采場塌陷和地表沉陷等大規(guī)模的地壓活動，還可以最大限度的增加礦石回采率，提高礦山企業(yè)的經(jīng)濟效益。 本課題結(jié)合大足區(qū)胡家溝石灰?guī)r礦的實際開采情況，針對胡家溝礦山的地質(zhì)條件、礦巖力學(xué)性能，，采用理論計算和數(shù)值模擬房柱法開采參數(shù)中的礦房跨度、采高、礦柱直徑和礦柱間距，進行對比分析原開采設(shè)計參數(shù)，得出以下結(jié)論： 采用一定的理論計算房柱法采場參數(shù)得出礦房跨度10m、護頂層厚度9m、礦柱間距10m和礦柱直徑6m，符合現(xiàn)場實際情況和工程經(jīng)驗；應(yīng)用FLAC3D軟件數(shù)值模擬胡家溝石灰?guī)r礦房柱法開采過程中圍巖、礦柱等的應(yīng)力、位移和塑性區(qū)的變化規(guī)律，從采高、礦房跨度、礦柱直徑和間距等四個方面得到采高6m、礦柱直徑6m、礦柱間距8m、礦房跨度10m，從而在保證安全的前提下最大限度地合理開采礦山資源。在采場結(jié)構(gòu)參數(shù)計算研究中，理論計算和數(shù)值模擬研究所得結(jié)果接近，符合工程經(jīng)驗和現(xiàn)場實際情況；相比礦山以前使用的采場結(jié)構(gòu)參數(shù)，優(yōu)化研究結(jié)果更有利于礦山進行開采作業(yè)，并在礦山得以初期應(yīng)用，在安全、經(jīng)濟、效益上更能滿足礦山生產(chǎn)。
[Abstract]:China is one of the countries with rich limestone resources in the world. At present, there are many underground limestone mining enterprises in the country. However, most of the mines belong to the civilian movement, not only the mining scale is small, but the production technology is backward. With the prolongation of mining time and the expansion of mining scope, the original experience does not consider fully the treatment of in-situ stress, which leads to unreasonable selection of mine stope parameters, which seriously affects the safety, economy and efficiency of mine production. At present, the underground mines of limestone in Chongqing are mainly concentrated in Dazu, Rongchang and other districts and counties. They mainly adopt the method of house and column mining, hand-held drill drilling, blasting and mining, small excavators or loaders to load ore, and car transportation in mining sites. Most mines use the roof column method of retaining limestone to protect the top floor. It is very important to select the reasonably designed stope parameters in the mining of limestone underground mines. Not only can the roof stability avoid large-scale ground pressure activities such as stope collapse and surface subsidence, but also the mining recovery rate can be increased to the maximum extent, and the economic benefits of mining enterprises can be improved. Combining with the actual mining situation of Hujiagou limestone mine in Dazu area, aiming at the geological conditions and the mechanical properties of the mine, this paper adopts theoretical calculation and numerical simulation of the roof span and mining height in the mining parameters of the Hujiagou mine. The diameter of the pillar and the distance between the pillars are compared and analyzed, and the following conclusions are drawn: By using certain theory to calculate the stope parameters of the roof column method, it is found that the roof span is 10m, the top protection thickness is 9m, the pillar spacing is 10m and the pillar diameter is 6m, which is in line with the actual situation and engineering experience on the spot. FLAC3D software is used to simulate the variation of stress, displacement and plastic zone of surrounding rock, pillar and so on in Hujiagou limestone house pillar mining process. The mining height is 6m, the diameter of pillar is 6m, the distance of pillar is 8m, and the span of mine house is 10m. In the study of stope structure parameter calculation, the results obtained by theoretical calculation and numerical simulation are close, which accord with the engineering experience and the actual situation of the site, and compared with the stope structure parameters used before the mine, The optimized research results are more favorable to mine mining operation and can be applied in the initial stage of mine, and can meet the needs of mine production in safety, economy and benefit.
【學(xué)位授予單位】：重慶科技學(xué)院
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TD872.5

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