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    Method for controlling subsidence area caused by underground mining in adjoining open-pit mine
    4.
    发明授权
    Method for controlling subsidence area caused by underground mining in adjoining open-pit mine 有权

    公开(公告)号：US11085296B2

    公开(公告)日：2021-08-10

    申请号：US16605122

    申请日：2017-06-06

    Applicant: China University of Mining and Technology

    Inventor： Feng Ju ,  Shuai Guo ,  Zhipeng Fu ,  Peng Huang ,  Pingshan Li ,  Yunfei Liu

    IPC: E21F15/00 ,  E21C41/16

    Abstract: A method for controlling a subsidence area caused by underground mining in an adjoining open-pit mine, applied in an open-pit and underground coordinated mining process. In the method, a ground subsidence area caused by underground mining and production is directly filled and covered with overburden materials such as soil and rock discharged from an adjoining open-pit mine; small and medium fracture zones and large fracture zones caused by mining are timely backfilled, tamped, and levelled according to areas before the ground subsidence area appears, the thickness of the levelled soil layer is kept above 1 m, and the area slope is controlled within 7°. By fully using overburden materials from an adjoining open-pit mine, the method controls a subsidence area caused by underground mining and greatly shortens the discharge distance of the overburden materials from the adjoining open-pit mine, also solves the safety problems such as air leakage and spontaneous combustion of coal caused by fractures in mine subsidence, and brings significant economic and social benefits.

    METHOD FOR CONTROLLING SUBSIDENCE AREA CAUSED BY UNDERGROUND MINING IN ADJOINING OPEN-PIT MINE
    5.
    发明申请
    METHOD FOR CONTROLLING SUBSIDENCE AREA CAUSED BY UNDERGROUND MINING IN ADJOINING OPEN-PIT MINE 审中-公开

    公开(公告)号：US20200300090A1

    公开(公告)日：2020-09-24

    申请号：US16605122

    申请日：2017-06-06

    Applicant: China University of Mining and Technology

    Inventor： Feng Ju ,  Shuai Guo ,  Zhipeng Fu ,  Peng Huang ,  Pingshan Li ,  Yunfei Liu

    IPC: E21F15/00

    Abstract: A method for controlling a subsidence area caused by underground mining in an adjoining open-pit mine, applied in an open-pit and underground coordinated mining process. In the method, a ground subsidence area caused by underground mining and production is directly filled and covered with overburden materials such as soil and rock discharged from an adjoining open-pit mine; small and medium fracture zones and large fracture zones caused by mining are timely backfilled, tamped, and levelled according to areas before the ground subsidence area appears, the thickness of the levelled soil layer is kept above 1 m, and the area slope is controlled within 7°. By fully using overburden materials from an adjoining open-pit mine, the method controls a subsidence area caused by underground mining and greatly shortens the discharge distance of the overburden materials from the adjoining open-pit mine, also solves the safety problems such as air leakage and spontaneous combustion of coal caused by fractures in mine subsidence, and brings significant economic and social benefits.

    INCLINED LAYERED SOLID-FILLING MINING METHOD IN ULTRATHICK COAL LAYER
    7.
    发明申请
    INCLINED LAYERED SOLID-FILLING MINING METHOD IN ULTRATHICK COAL LAYER 有权
    在ULTRATHICK煤层中采用层叠式固体填充采矿方法

    公开(公告)号：US20160102553A1

    公开(公告)日：2016-04-14

    申请号：US14891288

    申请日：2014-01-22

    Applicant: CHINA UNIVERSITY OF MINING AND TECHNOLOGY

    Inventor： Jixiong Zhang ,  Nan Zhou ,  Qiang Zhang ,  Jiwei Guo ,  Xiaoming Shen ,  Feng Ju ,  Haiqiang Jiang

    IPC: E21F15/02 ,  E21C41/16

    CPC classification number: E21F15/02 ,  E21C41/04 ,  E21C41/16 ,  E21D23/0481

    Abstract: An inclined layered solid-filling mining method in an ultrathick coal layer is applicable to exploitation in a “three-unders” ultrathick coal layer. In this method, the number of inclined layers is determined based on a principle of layered thickness from 2.5 m to 4.5 m, and a layered-exploitation downward-filling exploitation order is adopted. Tunnels and equipment are arranged according to a conventional solid-filling mining method. A cyclic order of mining, layout of metal meshes (14) and bamboo fences (24), and filling is adopted, so as to accomplish filling and exploitation of a first mining face and a first layer (21). Meanwhile, 4 months after the working face of this layer is finished, at a corresponding position in a second layer (22), under the cover of an artificial ceiling formed by the first layer (21), exploitation is performed by using the same filling mining method; such a cycle is repeated, and exploitation in a current layer is performed under the cover of an artificial ceiling fabricated by an upper layer, until the entire ultrathick coal layer is finished. When this method is adopted to exploit “three-unders” ultrathick coal layer resources, strata movement and earth surface subsidence may be effectively controlled; the method has a high extraction rate, high production efficiency, and low cost.

    Abstract translation: 超薄煤层倾斜层状固体填充开采方法适用于“三低”超薄煤层的开采。 在该方法中，倾斜层的数量根据层叠厚度为2.5μm〜4.5μm的原理确定，采用层叠剥离向下填充开采顺序。 隧道和设备根据常规的固体填充开采方法进行排列。 采用循环采矿顺序，金属网格（14）和竹栅栏布置（24），填充，完成第一采矿面和第一层的灌装开采（21）。 同时，在该层的工作面完成4个月后，在第二层（22）的相应位置，在由第一层（21）形成的人造天花板的盖下，利用相同的填充物 采矿方法; 重复这样一个循环，并且在由上层制造的人造天花板的盖子下进行当前层的开采，直到整个超薄煤层完成。 采用这种方法开发“三低”超薄煤层资源时，可以有效控制地层运动和地表沉降; 该方法提取率高，生产效率高，成本低。

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