WO2021008212A1 - High-pressure water-powered precise coal crushing and filling mining method in inclined coal seam - Google Patents

High-pressure water-powered precise coal crushing and filling mining method in inclined coal seam Download PDF

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WO2021008212A1
WO2021008212A1 PCT/CN2020/090114 CN2020090114W WO2021008212A1 WO 2021008212 A1 WO2021008212 A1 WO 2021008212A1 CN 2020090114 W CN2020090114 W CN 2020090114W WO 2021008212 A1 WO2021008212 A1 WO 2021008212A1
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coal
strip
filling
pressure water
crushed
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PCT/CN2020/090114
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French (fr)
Chinese (zh)
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孙强
张吉雄
黄鹏
张强
武中亚
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中国矿业大学
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    • 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
    • E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C45/00—Methods of hydraulic mining; Hydraulic monitors
    • 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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  • the invention relates to the technical field of coal resource filling and mining, in particular to a filling and mining method for accurately crushing coal using high-pressure water for inclined thin coal seams.
  • Filling mining technology has significant technical advantages in controlling rock movement, surface subsidence control, and solid waste treatment. Among them, for the “three under” thin coal seam mining, when ordinary fully mechanized mining filling equipment cannot be arranged on the working face, one can explore On the basis of filling, the method of using high-pressure water to crush coal resources and rotating them through augers is of great significance to the "three-under” thin coal mining.
  • the purpose of the present invention is to provide a high-pressure water precision crushed coal filling mining method for inclined coal seams, which can effectively control the movement of the overlying rock layer while reducing the loss of coal resources under the filling mining conditions of the thin coal seam.
  • a high-pressure water precision crushing coal filling mining method for inclined coal seams which is characterized by: including a crushing coal system, a transportation system, and a pipeline filling system.
  • the coal crushing system includes drilling into the coal seam through an auger with side holes, rotating the coal in the borehole through the rotation of the auger, and applying high-pressure water to the coal seam through the side holes.
  • the coal seam is broken, lumped, and broken by force, and the broken coal is extracted by rotating auger.
  • the transportation system refers to pumping crushed coal in a fluidized state to the surface through a pipeline.
  • the end of the transportation pipeline for pumping fluidized crushed coal is connected to the lower end of the arc funnel at the lower outlet of the strip.
  • the fluidized crushed coal produced by auger and high-pressure water first enters the arc-shaped funnel from the lower outlet of the strip, then enters the transportation pipeline through the bottom of the funnel, and is pumped to the ground through the transportation pipeline.
  • the pipeline filling system includes filling pipelines arranged in the upper trough of the section, and when one coal mining strip is mined, the lower outlet of the strip is closed, and the entire strip is filled in a subsurface filling manner.
  • a method for filling and mining inclined coal seams with high-pressure water precision crushed coal in the patent of the present invention includes the following steps:
  • f coal is the firmness coefficient of coal (Platinth coefficient);
  • F is the impact force generated by high-pressure water
  • f body is the firmness coefficient (Platinum's coefficient) of the cemented filling body
  • the auger is used to dig in and out of the coal from the lower trough to the upper trough of the working face.
  • a high-pressure water impact force greater than the strength of the coal seam is applied to the side holes of the auger. The coal seam is broken, and the coal is extracted with the threads of the auger.
  • the third step is to use the same method to mine the second strip working face at intervals. When the second strip working face is filled, start mining the strip seam skipped by the interval.
  • the fluidized crushed coal produced by the impact of auger and high-pressure water first enters the arc-shaped funnel at the lower outlet of the strip, where the transportation pipeline is connected to the bottom of the arc-shaped funnel, and the crushed coal directly enters the transportation pipeline through the arc-shaped funnel Is pumped to the surface.
  • the entire strip is cemented and filled.
  • the inclination angle of the inclined coal seam is greater than 8°, and the thickness of the coal seam is less than 1.3 m.
  • the length of the mining strip is within 150m, which is convenient for the drill pipe to enter the coal seam effectively.
  • the strip filling adopts a cemented filling method to fill the strips.
  • the present invention discloses a high-pressure water precision crushing coal filling mining method for inclined coal seams, which combines the filling mining technology with the high-pressure water crushing coal technology, which can smoothly mine thin coal seams under the conditions of "three unders" and It can effectively control the movement of the overlying rock and reduce the deformation of the ground.
  • the coal resources are soaked by water during the mining process, which reduces the pollution of coal dust in the underground mine, improves the underground working environment, and realizes the green and safe mining of underground coal resources.
  • the method of the invention is novel, integrates coal mining, filling, and dust reduction, has significant technical advantages in thin coal seam filling and mining, and has significant promotion value.
  • Figure 1 is a strip mining layout diagram of a high-pressure water precision crushed coal filling mining method for inclined coal seams of the present invention.
  • Fig. 2 is a layout diagram of the strip interval of a high-pressure water precision crushed coal filling mining method for inclined coal seams of the present invention.
  • the invention discloses a high-pressure water precision coal crushing and mining method for inclined coal seams, which includes a coal crushing system, a transportation system, and a pipeline filling system.
  • a high-pressure water is selected as the power to produce a high-strength impact on the coal seam, causing the coal seam to fracture, agglomerate and break.
  • the crushed solid coal is in a fluidized state with high-pressure water.
  • the fluidized crushed coal is pumped to the surface through the pipeline by arranging pipelines in the lower section of the section to complete the mining of coal resources.
  • the coal seam is mined in the whole section by skip mining.
  • the invention provides a high-pressure water precision coal-crushing and mining method for inclined coal seams, which reduces the cost of input equipment and effectively controls the movement of the overlying rock layer due to the influence of mining, thereby strengthening the rational utilization of resources.
  • a high-pressure water precision coal crushing and mining method for inclined coal seams includes a crushing coal system, a transportation system, and a pipeline filling system.
  • the coal crushing system includes drilling into the coal seam through an auger 1 with side holes, rotating the coal in the borehole through the rotation of the auger 1, and applying high pressure water to the coal on both sides of the borehole through the side holes. 8 Generate impact force, break, block, and crush the coal seam, and the broken coal 4 is extracted by rotating auger.
  • the auger with side holes is used by applying a water flow hole on the boundary of the drill rod, and a high pressure water flow channel in the center of the drill rod is connected to the water flow hole.
  • the transportation system refers to pumping the crushed coal 4 in a fluidized state to the surface through the transportation pipeline 2.
  • the end of the transport pipeline 2 for pumping the fluidized crushed coal 4 is connected to the lower end of the arc funnel 9 at the lower outlet of the strip.
  • the fluidized crushed coal 4 produced by the auger 1 and high-pressure water first enters the arc funnel 9 from the lower outlet of the strip, and then enters the transportation pipeline 2 through the bottom of the arc funnel 9, and is pumped to the ground through the transportation pipeline 2 .
  • the pipeline filling system includes filling pipelines 3 arranged along the grooves 5 in the section, and when one coal mining strip is mined, the lower outlet of the strip is closed, and the entire strip is filled by subsurface filling.
  • a method for filling and mining inclined coal seams with high-pressure water precision crushed coal in the patent of the present invention includes the following steps:
  • f coal is the firmness coefficient of coal (Platinth coefficient);
  • F is the impact force generated by high-pressure water
  • f body is the firmness coefficient (Platinum's coefficient) of the cemented filling body
  • the auger 1 is used to dig in and out of the coal.
  • the side holes of the auger are used to apply strength greater than the coal seam itself The impact of high-pressure water breaks the coal seam, and the coal is extracted with the threads of the auger.
  • the third step is to use the same method to mine the second strip working face at intervals. When the second strip working face is filled, start mining the strip seam skipped by the interval.
  • the fluidized crushed coal 4 produced by the impact of the auger 1 and high-pressure water first enters the arc-shaped hopper 9 at the lower outlet of the strip, where the transportation pipeline 2 is connected to the bottom end of the arc-shaped hopper 9, and the crushed coal 4 passes through The arc-shaped funnel 9 directly enters the transportation pipeline 2 and is pumped to the surface.
  • the entire strip is cemented and filled.
  • the filling pipe 3 in the upper trough 5 of the section, and fill the entire strip from the upper trough 5 to the lower trough 6 of the section.
  • the inclination angle of the inclined coal seam is greater than 8°, and the thickness of the coal seam is less than 1.3 m.
  • the length of the mining strip is within 150m, which is convenient for the drill pipe to enter the coal seam effectively.
  • the strip filling adopts a cemented filling method to fill the strips.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
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  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
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Abstract

A high-pressure water-powered precise coal crushing and filling mining method in an inclined coal seam, comprising a coal crushing system, a transportation system and a pipeline filling system. High-pressure water is used as power to generate a high-strength impact force on the coal seam, causing the cracking, breaking and crushing of the coal seam. The crushed solid coal is in a fluidized state along with the high-pressure water, by arranging a transportation pipeline (2) in a headentry (6) of a section, the fluidized crushed coal (4) is pumped to the ground through the transportation pipeline (2) to complete the mining of coal resources. After the coal in a roadway is crushed and transported, a lower outlet of a strip is closed, a filling pipeline (3) is arranged in a tailentry (5) of the section, and the roadway is filled in a top-down manner, wherein the coal seam is mined by interval skipping in the whole section.

Description

一种倾斜煤层的高压水精准碎煤充填开采方法High-pressure water precision crushed coal filling mining method for inclined coal seams 技术领域Technical field
本发明涉及煤炭资源充填开采技术领域，尤其涉及一种倾斜薄煤层利用高压水精准碎煤的充填开采方法。The invention relates to the technical field of coal resource filling and mining, in particular to a filling and mining method for accurately crushing coal using high-pressure water for inclined thin coal seams.
背景技术Background technique
目前，随着煤炭资源的高强度开采，东部浅部煤质条件较好的煤炭资源逐渐枯竭，遗留下的煤质条件较差的薄煤层以及“三下”的压煤仍然很严重，其中开采薄煤层的条件下限制了充填综采设备使用，使得解放“三下”条件下的薄煤层面临着严峻的挑战。At present, with the high-intensity mining of coal resources, the coal resources with better coal quality in the shallow eastern part are gradually depleted, and the remaining thin coal seams with poor coal quality and the "three under" coal compaction are still serious. The condition of thin coal seams restricts the use of fully mechanized filling equipment, which makes the thin coal seams under the conditions of liberation of "three lowers" face severe challenges.
充填开采技术在进行岩层移动控制、地表沉陷控制以及固体废弃物处理具有显著的技术优势，其中对于“三下”薄煤层开采，工作面无法布置普通的综采充填设备时，探索一种可以在充填的基础上，利用高压水将煤炭资源破碎并通过螺旋钻旋转采出的方法对“三下”的薄煤层开采具有重要的意义。Filling mining technology has significant technical advantages in controlling rock movement, surface subsidence control, and solid waste treatment. Among them, for the “three under” thin coal seam mining, when ordinary fully mechanized mining filling equipment cannot be arranged on the working face, one can explore On the basis of filling, the method of using high-pressure water to crush coal resources and rotating them through augers is of great significance to the "three-under" thin coal mining.
发明内容Summary of the invention
本发明的目的是提供一种倾斜煤层的高压水精准碎煤充填开采方法，解决薄煤层在充填开采条件下，减少煤炭资源的损失的同时，有效的控制上覆岩层的移动。The purpose of the present invention is to provide a high-pressure water precision crushed coal filling mining method for inclined coal seams, which can effectively control the movement of the overlying rock layer while reducing the loss of coal resources under the filling mining conditions of the thin coal seam.
技术方案：一种倾斜煤层的高压水精准碎煤充填开采方法，其特征是：包括碎煤系统、运输系统、管道充填系统。Technical proposal: A high-pressure water precision crushing coal filling mining method for inclined coal seams, which is characterized by: including a crushing coal system, a transportation system, and a pipeline filling system.
所述碎煤系统包括通过带有侧孔的螺旋钻钻入煤层中，通过螺旋钻的旋转将钻孔中的煤旋转采出，钻孔两侧的煤通过侧孔施加高压水对煤层产生冲击力将煤层断裂、成块、破碎，碎煤通过螺旋钻旋转采出。The coal crushing system includes drilling into the coal seam through an auger with side holes, rotating the coal in the borehole through the rotation of the auger, and applying high-pressure water to the coal seam through the side holes. The coal seam is broken, lumped, and broken by force, and the broken coal is extracted by rotating auger.
所述运输系统是指将呈流态化状态的碎煤通过管道泵送到地表。其中泵送流态化碎煤的运输管道端头连接在条带的下出口处的弧状漏斗下端。经螺旋钻和高压水采出的流态化碎煤首先从条带的下出口进入弧状漏斗中，然后通过漏斗的底部进入运输管道中，通过运输管道泵送到地面。The transportation system refers to pumping crushed coal in a fluidized state to the surface through a pipeline. The end of the transportation pipeline for pumping fluidized crushed coal is connected to the lower end of the arc funnel at the lower outlet of the strip. The fluidized crushed coal produced by auger and high-pressure water first enters the arc-shaped funnel from the lower outlet of the strip, then enters the transportation pipeline through the bottom of the funnel, and is pumped to the ground through the transportation pipeline.
所述管道充填系统包括通过在区段的上顺槽布置充填管道，当一个采煤条带开采完毕封闭条带的下出口，采用俯充的方式对整个条带进行充填。The pipeline filling system includes filling pipelines arranged in the upper trough of the section, and when one coal mining strip is mined, the lower outlet of the strip is closed, and the entire strip is filled in a subsurface filling manner.
本发明专利的一种倾斜煤层的高压水精准碎煤充填开采方法，包括如下步骤：A method for filling and mining inclined coal seams with high-pressure water precision crushed coal in the patent of the present invention includes the following steps:
第一步，首先根据煤层的地质条件和胶结充填体的物理性质，选择一种可以破碎煤和不能断裂胶结充填体的高压水压，即应满足如下公式：In the first step, according to the geological conditions of the coal seam and the physical properties of the cemented backfill, select a high-pressure water pressure that can break the coal and the cemented backfill, which should meet the following formula:
f 煤＜F＜f 体 f coal ＜F＜f body
式中：f 煤为煤的坚固性系数(普氏系数)； In the formula: f coal is the firmness coefficient of coal (Platinth coefficient);
F为高压水产生的冲击力；F is the impact force generated by high-pressure water;
f 体为胶结充填体的坚固性系数(普氏系数)； f body is the firmness coefficient (Platinum's coefficient) of the cemented filling body;
第二步，自工作面的下顺槽向上顺槽开始使用螺旋钻掘进出煤，在螺旋钻旋转采煤的过程中，通过在螺旋钻的侧孔施加大于煤层本身的强度的高压水冲击力将煤层破碎，随着螺旋钻的螺纹将煤炭采出。In the second step, the auger is used to dig in and out of the coal from the lower trough to the upper trough of the working face. In the process of rotating coal with the auger, a high-pressure water impact force greater than the strength of the coal seam is applied to the side holes of the auger. The coal seam is broken, and the coal is extracted with the threads of the auger.
第三步，采用同样的方法间隔开采第二个条带工作面，当第二个条带工作面充填完毕，开始开采间隔跳过的条带煤层。The third step is to use the same method to mine the second strip working face at intervals. When the second strip working face is filled, start mining the strip seam skipped by the interval.
第四步，对于螺旋钻和高压水冲击采出的流态化碎煤首先进入条带下出口的弧状漏斗中，其中运输管道与弧状漏斗底端相连接，碎煤经过弧状漏斗直接进入运输管道中被泵送到地表。In the fourth step, the fluidized crushed coal produced by the impact of auger and high-pressure water first enters the arc-shaped funnel at the lower outlet of the strip, where the transportation pipeline is connected to the bottom of the arc-shaped funnel, and the crushed coal directly enters the transportation pipeline through the arc-shaped funnel Is pumped to the surface.
第五步，当一个条带的煤开采完毕后，对整个条带进行胶结充填。首先将靠近下顺槽的条带出口封闭，在工作面的上顺槽布置充填管道，沿着整个条带从上顺槽向下顺槽充填。In the fifth step, when one strip of coal is mined, the entire strip is cemented and filled. First, close the strip outlet near the lower trough, arrange a filling pipe on the upper trough of the working surface, and fill the entire strip from the upper trough to the lower trough.
第六步，待整个条带充填工艺完成，重复第二步至第六步，采用跳采的方式开采整个煤层。In the sixth step, after the entire strip filling process is completed, repeat the second to sixth steps, and use skip mining to mine the entire coal seam.
所述的倾斜煤层的倾角大于8°，煤层厚度小于1.3m。The inclination angle of the inclined coal seam is greater than 8°, and the thickness of the coal seam is less than 1.3 m.
所述的开采条带的长度在150m之内，便于钻杆有效的进入煤层。The length of the mining strip is within 150m, which is convenient for the drill pipe to enter the coal seam effectively.
所述条带充填采用胶结充填的方式充填条带。The strip filling adopts a cemented filling method to fill the strips.
有益效果：本发明公开了一种倾斜煤层的高压水精准碎煤充填开采方法，将充填开采技术与高压水碎煤技术相结合，既能将“三下”条件下的薄煤层顺利采出，又能有效的控制上覆岩层的移动，减少地面的变形。同时煤炭资源在采出的过程中被水浸湿，减少了井下的煤尘的污染，改善了井下工作环境，实现井下煤炭资源的绿色、安全开采。本发明方法新颖，集采煤、充填、降尘于一体，在薄煤层充填开采方面具有显著的技术优势，具有显著的推广价值。Beneficial effects: The present invention discloses a high-pressure water precision crushing coal filling mining method for inclined coal seams, which combines the filling mining technology with the high-pressure water crushing coal technology, which can smoothly mine thin coal seams under the conditions of "three unders" and It can effectively control the movement of the overlying rock and reduce the deformation of the ground. At the same time, the coal resources are soaked by water during the mining process, which reduces the pollution of coal dust in the underground mine, improves the underground working environment, and realizes the green and safe mining of underground coal resources. The method of the invention is novel, integrates coal mining, filling, and dust reduction, has significant technical advantages in thin coal seam filling and mining, and has significant promotion value.
附图说明Description of the drawings
图1为本发明的一种倾斜煤层的高压水精准碎煤充填开采方法条带开采布置图。Figure 1 is a strip mining layout diagram of a high-pressure water precision crushed coal filling mining method for inclined coal seams of the present invention.
图2为本发明的一种倾斜煤层的高压水精准碎煤充填开采方法条带间隔布置图。Fig. 2 is a layout diagram of the strip interval of a high-pressure water precision crushed coal filling mining method for inclined coal seams of the present invention.
图中：1-螺旋钻；2-运输管道；3-充填管道；4-碎煤；5-区段上顺槽；6-区段下顺槽；7-胶结充填体；8-煤体；9-弧状漏斗。In the picture: 1- auger; 2- transportation pipeline; 3- filling pipeline; 4- crushed coal; 5- section upper trough; 6 section lower trough; 7- cemented packing; 8- coal body; 9- Curved funnel.
具体实施方式Detailed ways
本发明公开了一种倾斜煤层的高压水精准碎煤充填开采方法，包括碎煤系统、运输系统、管道充填系统。根据煤层的地质条件以及煤层本身的特性，如煤的硬度、倾角、厚度，选择一种以高压水为动力，对煤层产生高强度冲击力，致使煤层发生断裂、成块以及破碎。破碎的固体煤伴随着高压水呈流态化状态，通过在区段的下顺槽布置管道，将流态化的碎煤通过管道泵送到地表，完成煤炭资源的开采。待一个巷道的煤破碎、运输完毕，封闭条带的下出口，在区段上顺槽布置充填管道，采用俯充的方式对巷道进行充填其中在整个区段内采用间隔跳采的方式开采煤层。本发明为提供一种倾斜煤层的高压水精准碎煤充填开采方法，减少投入设备成本的同时，有效的控制因开采影响导致上覆岩层的移动，加强了资源的合理化利用。The invention discloses a high-pressure water precision coal crushing and mining method for inclined coal seams, which includes a coal crushing system, a transportation system, and a pipeline filling system. According to the geological conditions of the coal seam and the characteristics of the coal seam itself, such as the hardness, inclination angle, and thickness of the coal, a high-pressure water is selected as the power to produce a high-strength impact on the coal seam, causing the coal seam to fracture, agglomerate and break. The crushed solid coal is in a fluidized state with high-pressure water. The fluidized crushed coal is pumped to the surface through the pipeline by arranging pipelines in the lower section of the section to complete the mining of coal resources. After the coal in a roadway is broken and transported, the lower exit of the strip is closed, and filling pipes are arranged in the section along the groove, and the roadway is filled by the subsurface filling method. The coal seam is mined in the whole section by skip mining. The invention provides a high-pressure water precision coal-crushing and mining method for inclined coal seams, which reduces the cost of input equipment and effectively controls the movement of the overlying rock layer due to the influence of mining, thereby strengthening the rational utilization of resources.
下面结合附图对本发明的一种倾斜煤层的高压水精准碎煤充填开采方法进行详细描述。In the following, a detailed description will be given of a high-pressure water precision crushed coal filling mining method for inclined coal seams of the present invention with reference to the accompanying drawings.
如图1、2所示，一种倾斜煤层的高压水精准碎煤充填开采方法，包括碎煤系统、运输系统、管道充填系统。As shown in Figures 1 and 2, a high-pressure water precision coal crushing and mining method for inclined coal seams includes a crushing coal system, a transportation system, and a pipeline filling system.
所述碎煤系统包括通过带有侧孔的螺旋钻1钻入煤层中，通过螺旋钻1的旋转将钻孔中的煤旋转采出，通过侧孔施加高压水对钻孔两侧的煤体8产生冲击力，将煤层断裂、成块、破碎，碎煤4通过螺旋钻旋转采出。所使用的带有侧孔的螺旋钻，是通过在钻杆边界施加水流孔，钻杆中心有一高压水流通道与该水流孔连通。The coal crushing system includes drilling into the coal seam through an auger 1 with side holes, rotating the coal in the borehole through the rotation of the auger 1, and applying high pressure water to the coal on both sides of the borehole through the side holes. 8 Generate impact force, break, block, and crush the coal seam, and the broken coal 4 is extracted by rotating auger. The auger with side holes is used by applying a water flow hole on the boundary of the drill rod, and a high pressure water flow channel in the center of the drill rod is connected to the water flow hole.
所述运输系统是指将呈流态化状态的碎煤4通过运输管道2泵送到地表。其中泵送流态化碎煤4的运输管道2端头连接在条带的下出口处的弧状漏斗9下端。经螺旋钻1和高压水采出的流态化碎煤4首先从条带的下出口进入弧状漏斗9中，然后通过弧状漏斗9的底部进入运输管道2中，通过运输管道2泵送到地面。The transportation system refers to pumping the crushed coal 4 in a fluidized state to the surface through the transportation pipeline 2. The end of the transport pipeline 2 for pumping the fluidized crushed coal 4 is connected to the lower end of the arc funnel 9 at the lower outlet of the strip. The fluidized crushed coal 4 produced by the auger 1 and high-pressure water first enters the arc funnel 9 from the lower outlet of the strip, and then enters the transportation pipeline 2 through the bottom of the arc funnel 9, and is pumped to the ground through the transportation pipeline 2 .
所述管道充填系统包括通过在区段上顺槽5布置充填管道3，当一个采煤条带开采 完毕封闭条带的下出口，采用俯充的方式对整个条带进行充填。The pipeline filling system includes filling pipelines 3 arranged along the grooves 5 in the section, and when one coal mining strip is mined, the lower outlet of the strip is closed, and the entire strip is filled by subsurface filling.
本发明专利的一种倾斜煤层的高压水精准碎煤充填开采方法，包括如下步骤：A method for filling and mining inclined coal seams with high-pressure water precision crushed coal in the patent of the present invention includes the following steps:
第一步，首先根据煤层的地质条件和胶结充填体7的物理性质，选择一种可以破碎煤和不能断裂胶结充填体7的高压水压，即应满足如下公式：In the first step, according to the geological conditions of the coal seam and the physical properties of the cemented backfill 7, select a high-pressure water pressure that can break the coal and the cemented backfill 7, which should meet the following formula:
f 煤＜F＜f 体 f coal ＜F＜f body
式中：f 煤为煤的坚固性系数(普氏系数)； In the formula: f coal is the firmness coefficient of coal (Platinth coefficient);
F为高压水产生的冲击力；F is the impact force generated by high-pressure water;
f 体为胶结充填体的坚固性系数(普氏系数)； f body is the firmness coefficient (Platinum's coefficient) of the cemented filling body;
第二步，自区段的下顺槽6向区段上顺槽5开始使用螺旋钻1掘进出煤，在螺旋钻1旋转采煤的过程中，通过在螺旋钻的侧孔施加大于煤层本身的强度的高压水冲击力将煤层破碎，随着螺旋钻的螺纹将煤炭采出。In the second step, from the lower trough 6 of the section to the upper trough 5 of the section, the auger 1 is used to dig in and out of the coal. During the rotation of the auger 1 for coal mining, the side holes of the auger are used to apply strength greater than the coal seam itself The impact of high-pressure water breaks the coal seam, and the coal is extracted with the threads of the auger.
第三步，采用同样的方法间隔开采第二个条带工作面，当第二个条带工作面充填完毕，开始开采间隔跳过的条带煤层。The third step is to use the same method to mine the second strip working face at intervals. When the second strip working face is filled, start mining the strip seam skipped by the interval.
第四步，对于螺旋钻1和高压水冲击采出的流态化碎煤4首先进入条带下出口的弧状漏斗9中，其中运输管道2与弧状漏斗9底端相连接，碎煤4经过弧状漏斗9直接进入运输管道2中被泵送到地表。In the fourth step, the fluidized crushed coal 4 produced by the impact of the auger 1 and high-pressure water first enters the arc-shaped hopper 9 at the lower outlet of the strip, where the transportation pipeline 2 is connected to the bottom end of the arc-shaped hopper 9, and the crushed coal 4 passes through The arc-shaped funnel 9 directly enters the transportation pipeline 2 and is pumped to the surface.
第五步，当一个条带的煤开采完毕后，对整个条带进行胶结充填。首先将靠近区段下顺槽6的条带出口封闭，在区段的上顺槽5布置充填管道3，沿着整个条带从区段上顺槽5向区段下顺槽6充填。In the fifth step, when one strip of coal is mined, the entire strip is cemented and filled. First, close the strip outlet near the lower trough 6 of the section, arrange the filling pipe 3 in the upper trough 5 of the section, and fill the entire strip from the upper trough 5 to the lower trough 6 of the section.
第六步，待整个条带充填工艺完成，重复第二步至第六步，采用跳采的方式开采整个煤层。In the sixth step, after the entire strip filling process is completed, repeat the second to sixth steps, and use skip mining to mine the entire coal seam.
所述的倾斜煤层的倾角大于8°，煤层厚度小于1.3m。The inclination angle of the inclined coal seam is greater than 8°, and the thickness of the coal seam is less than 1.3 m.
所述的开采条带的长度在150m之内，便于钻杆有效的进入煤层。The length of the mining strip is within 150m, which is convenient for the drill pipe to enter the coal seam effectively.
所述条带充填采用胶结充填的方式充填条带。The strip filling adopts a cemented filling method to fill the strips.
以上所述仅是本发明的优选实施方式，应当指出：对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以做出若干改进和润饰，这些改进和润饰也应视为本发明的保护范围。The above are only the preferred embodiments of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also It should be regarded as the protection scope of the present invention.

Claims (6)

  1. 一种倾斜煤层的高压水精准碎煤充填开采方法，其特征是：包括碎煤系统、运输系统、管道充填系统；A high-pressure water precision crushed coal filling mining method for inclined coal seams is characterized in that it includes a crushing coal system, a transportation system, and a pipeline filling system;
    所述碎煤系统包括将带有侧孔的螺旋钻钻入煤层中，通过螺旋钻的旋转将钻孔中的煤旋转采出，通过螺旋钻的侧孔施加高压水对钻孔两侧的煤层产生冲击力，将煤层断裂、成块、破碎，碎煤通过螺旋钻旋转采出；The coal crushing system includes drilling an auger with side holes into the coal seam, rotating the coal in the borehole through the rotation of the auger, and applying high pressure water to the coal seams on both sides of the borehole through the side holes of the auger Generate impact force to break, block, and crush the coal seam, and the broken coal is mined by rotating auger;
    所述运输系统是指将呈流态化状态的碎煤通过管道泵送到地表，流态化的碎煤从条带的下出口进入布置在下顺槽中的碎煤的运输管道中，通过运输管道泵送到地面；The transportation system means that the crushed coal in a fluidized state is pumped to the surface through a pipeline, and the fluidized crushed coal enters the transportation pipeline of the crushed coal arranged in the lower trough from the lower outlet of the strip. The pipeline is pumped to the ground;
    所述管道充填系统包括通过在区段的上顺槽布置充填管道，当一个采煤条带开采完毕封闭条带的下出口，采用俯充的方式对整个条带进行充填。The pipeline filling system includes filling pipelines arranged in the upper trough of the section, and when one coal mining strip is mined, the lower outlet of the strip is closed, and the entire strip is filled in a subsurface filling manner.
  2. 根据权利要求1所述的一种倾斜煤层的高压水精准碎煤充填开采方法，其特征在于，泵送流态化碎煤的运输管道的端头连接在条带的下出口处的弧状漏斗下端，经螺旋钻和高压水采出的流态化碎煤首先从条带的下出口进入弧状漏斗中，然后通过漏斗的底部进入运输管道中，通过运输管道泵送到地面。The high-pressure water precision crushed coal filling mining method for inclined coal seams according to claim 1, wherein the end of the transport pipeline for pumping fluidized crushed coal is connected to the lower end of the arc funnel at the lower outlet of the strip , The fluidized crushed coal produced by auger and high-pressure water first enters the arc funnel from the lower outlet of the strip, then enters the transportation pipeline through the bottom of the funnel, and is pumped to the ground through the transportation pipeline.
  3. 根据权利要求1所述的一种倾斜煤层的高压水精准碎煤充填开采方法，其特征在于，包括如下步骤：The high-pressure water precision crushed coal filling mining method for inclined coal seams according to claim 1, characterized in that it comprises the following steps:
    第一步，首先根据煤层的地质条件和胶结充填体的物理性质，选择一种可以破碎煤和不能断裂胶结充填体的高压水压，即应满足如下公式：In the first step, according to the geological conditions of the coal seam and the physical properties of the cemented backfill, select a high-pressure water pressure that can break the coal and the cemented backfill, which should satisfy the following formula:
    f 煤＜F＜f 体 f coal ＜F＜f body
    式中：f 煤为煤的坚固性系数； Where: f coal is the firmness coefficient of coal;
    F为高压水产生的冲击力；F is the impact force generated by high-pressure water;
    f 体为胶结充填体的坚固性系数； f body is the firmness coefficient of cemented filling body;
    第二步，自工作面的下顺槽向上顺槽开始使用螺旋钻掘进出煤，在螺旋钻旋转采煤的过程中，通过在螺旋钻的侧孔施加大于煤层本身的强度的高压水冲击力将煤层破碎，随着螺旋钻的螺纹将煤炭采出；In the second step, the auger is used to dig in and out of the coal from the lower trough to the upper trough of the working face. In the process of rotating coal with the auger, a high-pressure water impact force greater than the strength of the coal seam is applied to the side holes of the auger. Break the coal seam and extract the coal with the screw thread of the auger;
    第三步，采用同样的方法间隔开采第二个条带工作面，当第二个条带工作面充填完毕，开始开采间隔跳过的条带煤层；The third step is to use the same method to mine the second strip working face at intervals. When the second strip working face is filled, start mining the strip seam skipped by the interval;
    第四步，螺旋钻和高压水冲击采出的流态化碎煤首先进入条带下出口的弧状漏斗中，其中运输管道与弧状漏斗底端相连接，碎煤经过弧状漏斗直接进入运输管道中被泵 送到地表；In the fourth step, the fluidized crushed coal produced by the impact of auger and high-pressure water first enters the arc-shaped funnel at the lower outlet of the strip, where the transportation pipeline is connected to the bottom of the arc-shaped funnel, and the crushed coal directly enters the transportation pipeline through the arc-shaped funnel Be pumped to the surface;
    第五步，当一个条带的煤开采完毕后，对整个条带进行胶结充填；首先将靠近下顺槽的条带出口封闭，在工作面的上顺槽布置充填管道，沿着整个条带从上顺槽向下顺槽充填；The fifth step, when the coal in a strip is mined, the entire strip is cemented and filled; first, the strip outlet near the lower trough is closed, and the filling pipe is arranged in the upper trough of the working face along the entire strip Fill the groove from top to bottom;
    第六步，待整个条带充填工艺完成，重复第二步至第六步，采用跳采的方式开采整个煤层。In the sixth step, after the entire strip filling process is completed, repeat the second to sixth steps, and use skip mining to mine the entire coal seam.
  4. 根据权利要求1所述的一种倾斜煤层的高压水精准碎煤充填开采方法，其特征在于所述的倾斜煤层的倾角大于8°，煤层厚度小于1.3m。The high-pressure water precision crushed coal filling mining method for inclined coal seams according to claim 1, wherein the inclination angle of the inclined coal seam is greater than 8°, and the thickness of the coal seam is less than 1.3 m.
  5. 根据权利要求1所述的一种倾斜煤层的高压水精准碎煤充填开采方法，其特征在于所述的开采条带的长度在150m之内。The high-pressure water precision crushed coal filling mining method for inclined coal seams according to claim 1, wherein the length of the mining strip is within 150m.
  6. 根据权力要求1所述的一种倾斜煤层的高压水精准碎煤充填开采方法，其特征在于所述条带充填采用胶结充填的方式充填条带。According to claim 1, a high-pressure water precision crushed coal filling mining method for inclined coal seams is characterized in that the strip filling adopts a cemented filling method to fill the strips.
PCT/CN2020/090114 2019-07-15 2020-05-14 High-pressure water-powered precise coal crushing and filling mining method in inclined coal seam WO2021008212A1 (en)

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