| 大冶铁矿同阶段崩落法转充填法开采隔离间柱合理宽度确定 |
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| 引用本文： | 王刘宝,刘艳章,尹东,姜维,张国权,蔡原田.大冶铁矿同阶段崩落法转充填法开采隔离间柱合理宽度确定[J].金属矿山,2020,50(5):89-94. |
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| 作者姓名： | 王刘宝 刘艳章 尹东 姜维 张国权 蔡原田 |
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| 作者单位： | 1. 武汉科技大学资源与环境工程学院，湖北 武汉 430081；2. 冶金矿产资源高效利用与造块湖北省重点实验室，湖北 武汉 430081；3. 武钢资源集团大冶铁矿有限公司，湖北 黄石 435006 |
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| 基金项目： | 国家自然科学基金面上项目（编号：51974206，51574183），国家自然科学基金（联合基金）重点项目（编号：U1802243）。 |
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| 摘 要： | 为保障同阶段崩落法转充填法开采顺利过渡，过渡段处须设置竖向隔离间柱。以大冶铁矿龙洞采区-170 m同阶段崩落法转充填法梯形隔离间柱为研究对象，将其简化为变惯性矩固支梁，并以间柱的水平应
变量允许值为判据，初步确定梯形隔离间柱上端的初始宽度。以梯形隔离间柱上端的初始宽度为基础，采用数值模拟方法，计算了不同梯形隔离间柱上端宽度与不同充填体灰砂比协同作用下的充填采场顶板围岩沉降
量，并对不同灰砂比下梯形隔离间柱上端宽度与顶板围岩最大沉降量进行了数据拟合，由顶板围岩允许沉降值得到与不同充填体灰砂比协同匹配下的梯形隔离间柱上端的合理宽度。数值计算结果表明：与充填体灰砂
比分别为1∶4、1∶6、1∶8、1∶10、1∶12协同匹配的梯形隔离间柱上端合理宽度分别为16、19、21、25、29 m。研究成果可为合理确定矿山同阶段崩落法转充填法开采过渡段隔离间柱宽度提供参考。
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| 关 键 词： | 隔离间柱 崩落法转充填法 灰砂比 顶板围岩沉降 |
Determination of Reasonable Width of Isolation Pillar between Caving Method and Filling Method in Same Level Mining Areas of Daye Iron Mine |
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| Wang Liubao,Liu Yanzhang,Yin Dong,Jiang Wei,Zhang Guoquan,Cai Yuantian.Determination of Reasonable Width of Isolation Pillar between Caving Method and Filling Method in Same Level Mining Areas of Daye Iron Mine[J].Metal Mine,2020,50(5):89-94. |
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| Authors: | Wang Liubao Liu Yanzhang Yin Dong Jiang Wei Zhang Guoquan Cai Yuantian |
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| Affiliation: | 1. College of Resources and Environmental Engineering， Wuhan University of Science and Technology， Wuhan 430081，China； 2. Hubei Key Laboratory for Efficient Utilization and
Agglomeration of Metallurgic Mineral Resources，Wuhan 430081，China； 3. Daye Iron Mine Limited Corporation，WISCO Resources Group， Huangshi 435006，China |
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| Abstract: | In order to ensure the smooth transition of mining from caving method to filling method in the same level， a vertical isolation pillar shall be set at the transition section.
Taking the trapezoidal isolation pillar of -170 m in Longdong mining area of Daye Iron Mine as the study object， it is simplified as a fixed beam with variable moment of inertia， and the
initial width of the upper end of the trapezoidal isolation pillar is preliminarily determined based on the allowable value of horizontal strain of the pillar. Based on the initial width of
the upper end of the trapezoidal isolation pillar，numerical simulation method is used to calculate the settlement of roof surrounding rock of the filling stope under the synergistic effect
of the different width of upper end of the trapezoidal isolation pillar and the different cement-sand ratio of backfill， and data fitting between the upper end width of the trapezoidal
isolation pillar and the maximum settlement of the roof surrounding rock under the different cement-sand ratio is carried out. From the allowable settlement of roof surrounding rock， a
reasonable width of the upper end of the trapezoidal isolation pillar was obtained， which was matched with the cement-sand ratio of the backfill. The numerical calculation results show
that the reasonable width of the upper end of the trapezoid isolation pillar matching backfill with the cement-sand ratio of 1∶4，1∶6，1∶8，1∶10 and 1∶12 is 16 m，19 m，21 m，25 m and
29 m respectively. The above study results can provide a reference for the determination of reasonable width of the transition isolation pillar in the same horizontal caving method to
filling method. |
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