WO2017185724A1 - 一种充填与综采混采面过渡支架支护参数设计方法 - Google Patents

一种充填与综采混采面过渡支架支护参数设计方法 Download PDF

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WO2017185724A1
WO2017185724A1 PCT/CN2016/106342 CN2016106342W WO2017185724A1 WO 2017185724 A1 WO2017185724 A1 WO 2017185724A1 CN 2016106342 W CN2016106342 W CN 2016106342W WO 2017185724 A1 WO2017185724 A1 WO 2017185724A1
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filling
face
transition
section
transition section
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PCT/CN2016/106342
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French (fr)
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张吉雄
孙强
张强
殷伟
闫浩
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中国矿业大学
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Priority to RU2018116231A priority Critical patent/RU2679767C1/ru
Priority to AU2016405114A priority patent/AU2016405114B2/en
Priority to US15/770,500 priority patent/US10301939B2/en
Priority to DE112016005692.3T priority patent/DE112016005692B4/de
Publication of WO2017185724A1 publication Critical patent/WO2017185724A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/0481—Supports specially adapted for use in combination with the placing of filling-up materials
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C39/00—Devices for testing in situ the hardness or other properties of minerals, e.g. for giving information as to the selection of suitable mining tools
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C41/00—Methods of underground or surface mining; Layouts therefor
    • E21C41/16—Methods of underground mining; Layouts therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
    • E21F15/00—Methods or devices for placing filling-up materials in underground workings
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    • G06F30/00—Computer-aided design [CAD]
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    • G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
    • G06Q50/02—Agriculture; Fishing; Forestry; Mining

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  • the invention relates to a design method for transition bracket support, in particular to a design method for supporting parameters of a transition bracket for a fully mechanized mining and fully mechanized mining face.
  • Filling and fully mechanized mining refers to the simultaneous arrangement of integrated mechanized filling coal mining equipment and traditional comprehensive mining equipment in the same working face, and the coal mining system and coal mining technology that coordinate the coal mining and filling operations.
  • the filling and fully mechanized mining face is mainly composed of filling section, transition section and fully mechanized mining section.
  • the filling section is equipped with key equipment such as filling coal mining hydraulic support and rear porous bottom unloading conveyor.
  • the working surface is made of vermiculite. Solid materials such as fly ash are used as filling bodies to fill the rear goaf to achieve the purpose of treating solid waste; while the working face of fully mechanized mining section adopts traditional comprehensive mechanized coal mining method, and the working face is arranged with traditional coal mining hydraulic support.
  • the top of the field is naturally down, and the transition is between the two.
  • the transition section is a unique area of the mixed working face.
  • the development of overburden fractures and the characteristics of the mining pressure are obviously different from those of the filling section and the falling section.
  • the enrichment rate is the key factor affecting the fall height of the transition section and the stress range of the transition section.
  • the influence of the falling height and the influence range of the transition section stress can accurately predict the fall height and the stress range of the transition section, so as to calculate the supporting parameters such as the strength and quantity of the pillar of the transitional support, and the safety of the transitional support of the filling and fully mechanized mining. Support is of great significance.
  • the object of the present invention is to provide a method for designing a transitional support parameter of a simple and accurate filling method and a fully mechanized mining face in view of the problems existing in the prior art.
  • the filling of the present invention and fully mechanized mining working face mixed Supporting Design transition bracket first filling capacity according to the demand and the production capacity of coal face filling mixed working face segment to determine the total length of the mixing face and L always filled face charge period length L; then, according to the working surface coal testing of mechanical parameters, establishing filling and Numerical model mechanized mining exploitation by mixing 3DEC DEM software simulation goaf different filling segment plumpness When changing, the falling height H of the transition section and the stress range S of the transition section; based on the numerical simulation results, the curve is fitted according to the correlation coefficient R 2 to obtain the filling rate. It is a function of the height H of the slump and the influence range S of the transition section. Finally, the parameters of the transition section are determined in combination with the actual engineering geological parameters; the specific steps are as follows:
  • ⁇ generally takes 2.5MPa/100m
  • N is the smallest positive integer greater than or equal to n
  • the rate of enrichment The range of variation is 60% to 80%.
  • the design method of the transition support support parameters of the filling and fully mechanized mining face of the present invention only needs to determine the filling rate of the filling section of the mixed mining face in practical application, and the overburden height of the transition section can be calculated according to the regression equation. And the influence range of the stress in the transition section, the support parameters such as the strength and quantity of the transition support are determined by calculation.
  • This method provides a reference for the design of the transition support support parameters of the filling and fully mechanized mining face, for filling and fully mechanized mining.
  • the safety support of the working face transition bracket provides a theoretical reference.
  • the design method is simple and easy, and has high accuracy. It can provide reference for the support design of the bracket, realize the smooth transition of the mixed working face filling bracket and the fully mechanized mining bracket, further enrich the theory of filling coal mining, and expand the application range of filling coal mining. Practicality.
  • Figure 1 shows the arrangement of the filling and fully mechanized mixed working face system of the present invention.
  • Fig. 2a is a numerical calculation model for mining and fully mechanized mixed working face mining of the present invention.
  • 2b is a top view of the working surface of the numerical calculation model for the filling and fully mechanized mixed working face mining of the present invention.
  • Fig. 2c is a cross-sectional view showing the working face of the numerical calculation model of the filling and fully mechanized mixed working face mining of the present invention.
  • Fig. 3 is a graph showing the filling rate-transition section slumping belt height of the mixed working face of the filling and fully mechanized mining of the present invention.
  • Fig. 4 is a graph showing the influence range of the filling rate-transition section stress of the mixed working face of the filling and fully mechanized mining of the present invention.
  • ⁇ generally takes 2.5MPa/100m
  • N is the smallest positive integer greater than or equal to n
  • the rate of enrichment The range of variation is 60% to 80%.
  • Embodiment 1 takes a mine as an example, and the specific implementation steps are as follows:
  • the total length of the first mining working face (shown in Figure 1) mixed with the filling method and the falling method is designed to be 220m; combined with the annual output demand of the underground meteorite, the filling section works.
  • the length of the surface is 120m; the filling rate of the working surface of the filling section varies from 60% to 80%.
  • the numerical calculation model is established by 3DEC numerical simulation software, as shown in Figure 2; the model length ⁇ width ⁇ height is 300m ⁇ 200m ⁇ 80m; the surrounding is constrained in the horizontal direction, the bottom is constrained in the vertical direction; the constitutive relation is the Mohr-Coulomb model.
  • ⁇ is taken as 2.5 MPa/100 m.
  • N is the smallest positive integer greater than or equal to n
  • the support strength of the design transition section is 0.84 MPa, and the number of bracket support in the transition section is 4.

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Abstract

一种充填与综采混采面过渡支架支护参数设计方法。首先根据混合开采工作面采煤生产能力与充填段（1）工作面充填能力需求，确定混合工作面总长度L 总与充填段（1）长度L 充；然后，通过3DEC三维离散元软件建立充填与综采混合开采数值模型，模拟计算充填段（1）采空区不同充实率φ变化时，过渡段（2）顶板垮落高度H以及过渡段（2）应力影响范围S；基于数值模拟计算结果，按相关系数R2对曲线进行拟合得到充实率φ与垮落高度H、过渡段（2）应力影响范围S的函数关系；最后结合实际工程地质参数对过渡段支架（4）支护参数进行设计。该方法可为支架支护设计提供参考，实现混合工作面充填支架与综采支架平稳过渡，进一步丰富充填采煤理论，扩大充填采煤的应用范围。

Description

一种充填与综采混采面过渡支架支护参数设计方法 技术领域
本发明涉及一种过渡支架支护设计方法，特别是一种充填与综采混采面过渡支架支护参数设计方法。
背景技术
充填与综采混合开采是指在同一个工作面同时布置综合机械化充填采煤设备与传统综采设备，各设备之间相互协调、共同完成采煤、充填作业的采煤系统和采煤工艺。充填与综采混合开采工作面主要由充填段、过渡段和综采段组成，充填段工作面布置有充填采煤液压支架及后部多孔底卸式输送机等关键设备，工作面以矸石、粉煤灰等固体材料作为充填体充填后部采空区，达到处理固体废弃物的目的；而综采段工作面采用传统综合机械化采煤方法采煤，工作面布置传统采煤液压支架，采场顶板自然垮落，过渡段则介于两者之间。过渡段是混合工作面特有的区域，该区域覆岩裂隙发育、矿压显现特征与充填段和垮落段具有明显的差异。目前，对充填与综采混合开采工作面过渡支架支护参数设计还没有一种准确的方法，而充实率是影响过渡段垮落高度和过渡段应力影响范围的关键因素，研究充实率对垮落高度和过渡段应力影响范围的影响，可准确预计垮落高度和过渡段应力影响范围，从而计算出过渡支架的支柱强度和数量等支护参数，对充填与综采混合开采过渡支架的安全支护具有重要意义。
发明内容
技术问题：本发明的目的是针对现有技术存在的问题，提供一种方法简单，准确的充填与综采混采面过渡支架支护参数设计方法。
技术方案：本发明的充填与综采混合开采工作面过渡支架支护设计方法，首先根据混合开采工作面采煤生产能力与充填段工作面充填能力需求，确定混合工作面总长度L总与充填段工作面长度L充；然后，根据工作面区域煤岩物理力学参数测试，通过3DEC三维离散元软件建立充填与综采混合开采数值模型，模拟计算充填段采空区不同充实率
Figure PCTCN2016106342-appb-000001
变化时，过渡段顶板垮落高度H以及过渡段应力影响范围S；基于数值模拟计算结果，按相关系数R2对曲线进行拟合得到充实率
Figure PCTCN2016106342-appb-000002
与垮落高度H、过渡段应力影响范围S的函数关系；最后，结合实际工程地质参数，确定过渡段支架参数；其具体的步骤如下：
(1)根据混合开采工作面采煤生产能力与充填段工作面充填能力需求，确定混合工作面总长度L总与充填段工作面长度L充；
(2)根据工作面区域煤岩物理力学参数测试，通过3DEC三维离散元软件建立充填与综采混合开采数值模型；
(3)在确定采高M，混合工作面总长度L总与充填段工作面1长度L充前提下，模拟充填段不同充实率
Figure PCTCN2016106342-appb-000003
变化时，过渡段2顶板垮落高度H以及过渡段2应力影响范围S；
(4)按相关系数R2对曲线进行拟合得到充实率
Figure PCTCN2016106342-appb-000004
与垮落高度H、过渡段应力影响 范围S的函数关系；
(5)根据实际工程中设计充实率
Figure PCTCN2016106342-appb-000005
计算混合工作面过渡段垮落高度H’，由以下公式计算确定过渡段支架支护强度：
F＝rH'
式中：γ一般取2.5MPa/100m；
(6)根据实际工程中设计充实率
Figure PCTCN2016106342-appb-000006
计算混合工作面过渡段应力影响范围S’，由以下公式计算确定过渡段支架数量：
Figure PCTCN2016106342-appb-000007
式中：N一大于等于n的最小正整数；
a一单个过渡支架宽度。
所述充实率
Figure PCTCN2016106342-appb-000008
的变化范围为60％～80％。
有益效果：本发明的充填与综采混采面过渡支架支护参数设计方法在实际运用时只需确定混合开采工作面充填段充实率，便可根据回归方程计算出过渡段覆岩垮落高度和过渡段应力影响范围，通过计算确定过渡支架支护强度和数量等支护参数，此方法为充填与综采混合开采工作面过渡支架支护参数设计提供了参考，为充填与综采混合开采工作面过渡支架的安全支护提供理论借鉴。此设计方法简单易行，准确性高，可为支架支护设计提供参考，实现混合工作面充填支架与综采支架平稳过渡，进一步丰富充填采煤理论，扩大充填采煤的应用范围，具有广泛的实用性。
附图说明
图1为本发明充填与综采混合工作面系统布置。
图2a为本发明充填与综采混合工作面开采数值计算模型。
图2b为本发明充填与综采混合工作面开采数值计算模型工作面俯视图。
图2c为本发明充填与综采混合工作面开采数值计算模型工作面倾向断面图。
图3为本发明充填与综采混合工作面充实率-过渡段垮落带高度曲线图。
图4为本发明充填与综采混合工作面充实率-过渡段应力影响范围曲线图。
图中，1、充填段；2、过渡段；3、垮落段；4、过渡段支架。
具体实施方式
本发明的充填与综采混合开采工作面过渡支架支护设计方法，首先根据混合开采工作面采煤生产能力与充填段工作面充填能力需求，确定混合工作面总长度L总与充填段工作面长度L充；然后，根据工作面区域煤岩物理力学参数测试，通过3DEC三维离散元软件建立充填与综采混合开采数值模型，模拟计算充填段采空区不同充实率
Figure PCTCN2016106342-appb-000009
变化时，过渡段顶板垮落高度H以及过渡段应力影响范围S；基于数值模拟计算结果，按相关系数R2对曲线进行拟合得到充实率
Figure PCTCN2016106342-appb-000010
与垮落高度H、过渡段应力影响范围S的函数关系； 最后，结合实际工程地质参数，确定过渡段支架参数；其具体的步骤如下：
(1)根据混合开采工作面采煤生产能力与充填段工作面充填能力需求，确定混合工作面总长度L总与充填段工作面长度L充；
(2)根据工作面区域煤岩物理力学参数测试，通过3DEC三维离散元软件建立充填与综采混合开采数值模型；
(3)在确定采高M，混合工作面总长度L总与充填段工作面1长度L充前提下，模拟充填段不同充实率
Figure PCTCN2016106342-appb-000011
变化时，过渡段2顶板垮落高度H以及过渡段2应力影响范围S；
(4)按相关系数R2对曲线进行拟合得到充实率
Figure PCTCN2016106342-appb-000012
与垮落高度H、过渡段应力影响范围S的函数关系；
(5)根据实际工程中设计充实率
Figure PCTCN2016106342-appb-000013
计算混合工作面过渡段垮落高度H’，由以下公式计算确定过渡段支架支护强度：
F＝rH'
式中：γ一般取2.5MPa/100m；
(6)根据实际工程中设计充实率
Figure PCTCN2016106342-appb-000014
计算混合工作面过渡段应力影响范围S’，由以下公式计算确定过渡段支架数量：
Figure PCTCN2016106342-appb-000015
式中：N一大于等于n的最小正整数；
a一单个过渡支架宽度。
所述充实率
Figure PCTCN2016106342-appb-000016
的变化范围为60％～80％。
下面结合附图对本发明的一个实施例作进一步的描述：
实施例1，以某矿为例，具体实施步骤如下：
(1)根据该矿三水平主采煤层工作面生产能力，设计充填与垮落法混合首采工作面(如图1所示)总长度为220m；结合井下矸石年产量需求，充填段工作面长度为120m；充填段工作面充实率变化范围为60％～80％。
(2)对混合首采工作面区域煤岩样物理力学特性测试，得到煤岩体的物理力学参数，见表1。
表1
Figure PCTCN2016106342-appb-000017
(3)根据充填与垮落混合工作面工程地质条件与煤岩体的物理力学参数，采用3DEC数值模拟软件建立数值计算模型，如图2所示；模型长×宽×高为300m×200m×80m；四周约束水平方向位移，底部约束垂直方向位移；本构关系采用摩尔-库伦模型。
(4)分别模拟计算充填段长度L充不变、充实率
Figure PCTCN2016106342-appb-000018
变化时，工作面过渡段覆岩垮落高度与过渡段应力影响范围，具体模拟方案见表2；
表2
Figure PCTCN2016106342-appb-000019
(5)以模拟结果为基础，按相关系数R2对曲线进行拟合得到充实率
Figure PCTCN2016106342-appb-000020
与垮落高度H、过渡段2应力影响范围S的函数关系，如图3、4所示。
(6)实际现场充实率为70％左右，由图3计算混合工作面过渡段2垮落高度H’约为30.5m，计算确定过渡段2支架支护强度：
F＝rH'＝0.7625MPa
式中：γ取2.5MPa/100m。
(6)根据实际工程中设计充实率
Figure PCTCN2016106342-appb-000021
由图4计算混合工作面过渡段2应力影响范围S’约为6.2m，由以下公式计算确定过渡段2支架数量：
Figure PCTCN2016106342-appb-000022
式中：N一大于等于n的最小正整数；
a一单个过渡支架宽度取1.5m。
最终考虑一定的富余系数，设计过渡段支架支护强度为0.84MPa，过渡段支架支护数量为4架。

Claims (2)

  1. 一种充填与综采混采面过渡支架支护参数设计方法，其特征是：首先根据混合开采工作面采煤生产能力与充填段工作面充填能力需求，确定混合工作面总长度L总与充填段工作面1长度L充；然后，根据工作面区域煤岩物理力学参数测试，通过3DEC三维离散元软件建立充填与综采混合开采数值模型，模拟计算充填段采空区不同充实率
    Figure PCTCN2016106342-appb-100001
    变化时，过渡段顶板垮落高度H以及过渡段应力影响范围S；基于数值模拟计算结果，按相关系数R2对曲线进行拟合得到充实率
    Figure PCTCN2016106342-appb-100002
    与垮落高度H、过渡段应力影响范围S的函数关系；最后，结合实际工程地质参数，确定过渡段支架参数；其具体的步骤如下：
    (1)根据混合开采工作面采煤生产能力与充填段工作面充填能力需求，确定混合工作面总长度L总与充填段工作面1长度L充；
    (2)根据工作面区域煤岩物理力学参数测试，通过3DEC三维离散元软件建立充填与综采混合开采数值模型；
    (3)在确定采高M，混合工作面总长度L总与充填段工作面长度L充前提下，模拟充填段不同充实率
    Figure PCTCN2016106342-appb-100003
    变化时，过渡段顶板垮落高度H以及过渡段应力影响范围S；
    (4)按相关系数R2对曲线进行拟合得到充实率
    Figure PCTCN2016106342-appb-100004
    与垮落高度H、过渡段应力影响范围S的函数关系；
    (5)根据实际工程中设计充实率
    Figure PCTCN2016106342-appb-100005
    计算混合工作面过渡段垮落高度H’，由以下公式计算确定过渡段支架支护强度：
    F＝rH'
    式中：γ一般取2.5MPa/100m；
    (6)根据实际工程中设计充实率
    Figure PCTCN2016106342-appb-100006
    计算混合工作面过渡段应力影响范围S’，由以下公式计算确定过渡段支架数量：
    Figure PCTCN2016106342-appb-100007
    式中：N一大于等于n的最小正整数；
    a一单个过渡支架宽度。
  2. 根据权利要求1所述的一种充填与综采混采面过渡支架支护参数设计方法，其特征在于：所述充实率
    Figure PCTCN2016106342-appb-100008
    的变化范围为60％～80％。
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