WO2012016513A1 - 具有副巷道的原地浸取引流收液工艺 - Google Patents

具有副巷道的原地浸取引流收液工艺 Download PDF

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Publication number
WO2012016513A1
WO2012016513A1 PCT/CN2011/077907 CN2011077907W WO2012016513A1 WO 2012016513 A1 WO2012016513 A1 WO 2012016513A1 CN 2011077907 W CN2011077907 W CN 2011077907W WO 2012016513 A1 WO2012016513 A1 WO 2012016513A1
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Prior art keywords
roadway
collecting
liquid
liquid collection
auxiliary
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PCT/CN2011/077907
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English (en)
French (fr)
Inventor
谭尧峰
刘彦
邓国庆
何小林
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江西稀有金属钨业控股集团有限公司
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Application filed by 江西稀有金属钨业控股集团有限公司 filed Critical 江西稀有金属钨业控股集团有限公司
Priority to AU2011288098A priority Critical patent/AU2011288098A1/en
Priority to EP11814096.1A priority patent/EP2602426A1/en
Priority to US13/814,112 priority patent/US20130200681A1/en
Priority to JP2013522090A priority patent/JP2013535598A/ja
Priority to KR1020137005515A priority patent/KR101407350B1/ko
Publication of WO2012016513A1 publication Critical patent/WO2012016513A1/zh

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/02—Apparatus therefor
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B59/00—Obtaining rare earth metals
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/28—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent
    • E21B43/283—Dissolving minerals other than hydrocarbons, e.g. by an alkaline or acid leaching agent in association with a fracturing process
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C41/00—Methods of underground or surface mining; Layouts therefor
    • E21C41/26—Methods of surface mining; Layouts therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the invention relates to the technical field of mineral exploitation, in particular to an in-situ leaching drainage liquid collection process, in particular to a in-situ leaching and liquid collection process of a full double ion adsorption type rare earth ore.
  • the first type of liquid collection technology is artificial false bottom interception and liquid collection.
  • the technology adopts engineering technical measures such as liquid collecting roadway, intercepting hole and cement slurry to prevent seepage treatment of liquid collecting project, and set artificial liquid mother collecting system, but the mother liquid is collected.
  • the anti-seepage technology of the intercepting hole is not mature enough, which often leads to the plugging of the intercepting hole and the anti-seepage material anti-seepage to the upper half wall and the side wall of the intercepting hole, which hinders the normal collection of the mother liquid.
  • the mother liquor loss rate is large.
  • the intercept hole does not control the mother liquor infiltration well.
  • the mother liquor collection system has the loss rate of the pre-mineral solution and the rare earth mother liquor.
  • the balance is not conducive to the recovery of rare earth mother liquor, thereby reducing the recovery rate of rare earths, forming a bottleneck that is difficult to increase the recovery rate of rare earths, and will also cause environmental pollution and other problems.
  • the second liquid-receiving technique is a technique of artificially feeding water into a lean ore-free layer and a non-mineral layer to saturate it to form an artificial water-sealed floor.
  • the biggest disadvantages of artificial water-sealed bottom plate are long process cycle, long tail liquid collection time, low mother liquor concentration, harsh implementation conditions, difficult implementation, and especially difficult to control the stability of mountain slopes. In actual mining activities, artificial water seals are rarely used.
  • the object of the present invention is to provide an in-situ leaching drainage liquid collection process with a secondary roadway, so that most of the pre-mineral liquid (more than 80%) penetrates below the engineering control surface to improve the lean or non-mineral layer below the engineering control surface.
  • the water content so as to increase the ratio of the pre-mineral solution into the lean or no ore zone and reduce the ratio of the mother liquor to the ground, thereby achieving the purpose of improving the recovery of the rare earth.
  • the process can reduce the loss rate of the mother liquor, is beneficial to the recovery of the rare earth mother liquor, can reduce the environmental pollution problem, and can also improve the rare earth recovery rate.
  • the present invention provides an in-situ leaching drainage liquid collection process having a secondary roadway, characterized in that:
  • the auxiliary roadway is arranged on both sides of the collecting roadway, and the pressure gradient is alternately changed, and finally a multi-channel mother liquid drainage liquid collecting control engineering surface is formed on the plane composed of the ore body between the liquid collecting roadway, the auxiliary roadway and the roadway, and Forming a mother liquor collection control system together with a lean or no ore zone that changes the water content;
  • a sealing wall is arranged in the collecting roadway, and the front part of the sealing wall is connected to the roadway opening by a conduit, and the pipe is controlled by a ball valve switch at the exit;
  • a high and low pressure gradient zone is formed on the plane formed between the ore body and the engineering control surface by the change of the pressure gradient, and finally a multi-channel mother liquor collection engineering system is formed;
  • the liquid collection roadway is set according to the following principles:
  • the height of the collecting tunnel in the ore body is between 0.015% and 0.02% of the bottom of the ore body;
  • the liquid collection roadway is arranged along the mountain body
  • the location of the collection tunnel is preferably passed through a good grade of the ore body.
  • the auxiliary roadway is arranged on both sides of the collecting roadway, and the auxiliary roadway and the liquid collecting roadway together form a multi-channel mother liquid drainage liquid collecting control engineering surface.
  • a plurality of sealing walls are arranged in the collecting roadway, and the sealing wall is an impervious wall embedded in the surrounding of the roadway to prevent the outflow of the pre-mineral liquid, so that the pre-mineral liquid is infiltrated along the engineering control surface, and the roadway collapse is prevented before and after the sealing of the wall.
  • a sealing wall is arranged every 20 to 30 meters in the direction of the working face to the collecting channel, and a plurality of sealing walls can be arranged up to a distance of 10 meters from the roadway.
  • the location of the sealing wall can be in front of and adjacent to the roadway support column to prevent the sealing wall from collapsing.
  • the sealing wall can be set by means of red bricks embedded in the roadway.
  • the front part of the sealing wall is filled with anti-blocking materials, and the lower part is connected to the collecting roadway by a conduit. At the same time, attention should be paid to the anti-blocking measures of the roadway and the pipeline.
  • the duct is controlled by a ball valve switch at the exit. The ball valve switch is used to detect whether there is a mother liquid.
  • a high and low pressure gradient zone is formed between the ore body and the engineering control surface by increasing and releasing the pressure, and finally forming a plurality of
  • the channel mother liquor recovery control engineering system forms a mother liquor collection control system together with the lean or no-mineral zone that changes the water content.
  • the lower front conduit of the plugging wall is opened with a ball valve at the outlet, and the main purpose is to control the infiltration of the pre-mine solution and the collection of the mother liquor.
  • the anti-blocking material may be firewood.
  • the conduit can be a plastic coil or a PVC tube.
  • the pipeline is inspected daily (or according to its characteristics) for the presence of mother liquor.
  • the purpose is to reduce the pre-mine solution to the engineering control surface as much as possible, and reduce the infiltration of the mother liquor at the engineering control surface. Capacity; 2
  • the ball valve switch is released.
  • the multi-channel, liquid-collecting roadway and the lean or non-mineral zone that change the water content form a mother liquid collection system; if there is no mother liquid, the ball valve switch is closed.
  • the number of daily inspections should be flexibly controlled according to the characteristics of the pre-mineral liquid, up to once a day. Through multiple inspections, a multi-pass mother liquor recovery control surface is formed which, together with its lower saturated or nearly saturated water cover, ultimately forms a mother liquor collection system for a water seal, high pressure gradient multiple mother fluid drainage path.
  • 2 to 3 strips are arranged to follow the trend or tendency of the mountain body, and the collecting channel which is supplemented by the position where the grade is distributed on the plane as much as possible is gentle, and the slope is 1 to 2°, which is advantageous for Infiltration of pre-mineral liquid.
  • the sealing wall may not be provided, and the static pressure grouting method is adopted to make most of the ore liquid infiltrated into the water sealing bottom plate along the ore body between the roadway.
  • the plurality of collecting lanes are parallel collecting lanes with a spacing of 15-20 meters.
  • the sections of the collecting roadway and the auxiliary roadway are trapezoidal, and the lower bottom width and the upper bottom width of the liquid collecting roadway are respectively 1.4 to 1.6 times of the auxiliary roadway, and the height of the liquid collecting roadway is 0.8 to 1.0 times of the auxiliary roadway. .
  • the section of the collecting roadway is a trapped liquid-collecting roadway having a width of 1.2 m at the bottom, a width of 0.7 m and a height of 1.7 m, and a section of the auxiliary roadway having a width of 0.8 m at the bottom and a width of 0.4 m and a height of 1.6 ⁇ . 1.7 meters.
  • the auxiliary roadway is arranged on both sides of the collecting roadway, and the interval between the auxiliary roadways is 5-10 meters, and the liquid collecting roadway is at an angle of 90[deg.] or parallel to each other.
  • the anti-seepage treatment may not be performed on the bottom of the collecting roadway and the auxiliary roadway.
  • the bottom of the collecting roadway and the auxiliary roadway are treated with a dilution cement slurry for anti-seepage treatment.
  • a red brick building is embedded around the roadway to set the sealing wall, and the sealing wall is not provided under special geological conditions.
  • the front part of the sealing wall is filled with firewood, and the lower part is connected to the roadway opening with a 1.5 to 3 inch (inner diameter 5 cm) plastic coil or PVC pipe.
  • the switching operation of the ball valve switch is combined multiple times, forming a combination of engineering control surface and mineral reduction and increasing pressure gradient, by increasing and decreasing pressure in the ore body and engineering control A high-low pressure gradient zone is formed between the faces, and finally a multi-channel mother liquor collection system with a water seal and a high pressure gradient is formed.
  • the pre-mineral solution in the in-situ leaching of the ion-adsorbing rare earth is effectively utilized, and about 15% of the water is contained in the granite weathering crust or the volcanic tuff ion-adsorbing rare earth ore, and the in-situ dip is performed.
  • the geotechnical engineering was injected with static pressure grouting, it was first rushed out and called the pre-mineral solution.
  • the process causes most of the pre-mineral liquid (about 80% or more) to penetrate into the lean ore-free zone, and alternately operates by reducing and increasing the pressure gradient between the control surface of the liquid-collecting project and the ore to form a multi-channel mother liquor.
  • the drainage control surface is finally introduced to improve the water content of the lean ore-free zone, prevent the infiltration of the rare earth mother liquor, reduce the amount of leaching agent, and reduce the loss rate of the mother liquor.
  • the multi-channel mother liquor recovery control surface is formed by the process of the invention, which is beneficial to the recovery of the rare earth mother liquor and reduces the environmental pollution problem.
  • Theoretical and practical use have confirmed that the rare earth resource recovery rate according to the present invention is increased by at least 10% or more, that is, the rare earth recovery rate is improved.
  • FIG. 1 is a plan view of a roadway connecting a roadway of a liquid collection roadway according to the present invention.
  • the specific implementation method of the technical solution of the present invention is as follows: according to the ore body grade distribution and hydraulic principle, the height in the ore body is between 0.015% and 0.02% of the bottom of the ore body, and the trend or tendency along the mountain body is Mainly, as much as possible by the position where the grade is distributed high on the plane, the liquid collection roadway 1 is set, and the slope is 1 to 2°.
  • the auxiliary roadway 8 is arranged at intervals of 5 to 10 meters on both sides of the collecting roadway, and the cement slurry anti-seepage measures can be implemented at the bottom of the roadway 1.
  • a plurality of support columns 7 may be disposed on both sides of the collection roadway 1.
  • the sealing wall 3 is implemented every 20 to 30 meters and in front of the nearby support column 7, thereby dividing the liquid collection roadway 1 into several sections.
  • the bottom is connected to the laneway by a coil or PVC pipe 4 to collect the mother liquor.
  • Each of the liquid collection roadways 1 separated by the sealing wall 3 is provided with a coil or a PVC pipe 4 connected to the roadway opening.
  • the roadway in front of the sealing wall 3 (the side away from the ball valve 6) is filled with anti-blocking firewood 5, and is subjected to anti-blocking treatment, and the ball valve 6 is connected at the outlet of the coil or PVC pipe 4.
  • the pre-mineral liquid is infiltrated along the control surface formed by the liquid collection roadway 1 and the auxiliary roadway 8, and the liquid collection system is opened when the mother liquid is present.
  • a multi-channel mother liquor collection engineering system is finally formed, which together with the lean or no-mineral zone that changes the water content forms a mother liquor collection system.

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Description

具有副巷道的原地浸取引流收液工艺 技术领域
本发明涉及矿藏开采技术领域，尤其是涉及原地浸取引流收液工艺，特别是全复式离子吸附型稀土矿的矿床原地浸取收液工艺。
背景技术
现有的全复式离子吸附型稀土原地浸取收液技术主要有两种。
第一种收液技术为人工假底截流收液，该技术采用集液巷道、截流孔、水泥浆对集液工程进行防渗处理等工程技术措施，设置人为的母液收集系统，但该母液收液系统存在某些明显的不足，首先，截流孔的防渗技术不够成熟，常导致截流孔封堵以及防渗材料对截流孔的上半壁及侧壁进行防渗，阻碍了母液正常收集，加大了母液损失率；其次，由于工程本身控制程度的局限性，截流孔并不能很好地对母液下渗做出控制；最后，该母液收集系统存在矿前液与稀土母液在损失率上的均衡性，不利于稀土母液的回收，从而降低了稀土回收率，形成了稀土回收率难以提高的瓶颈，也必将产生环境污染等问题。
第二种收液技术为采用人为地往贫矿层及无矿层带注水以达饱和，使之形成人工水封底板的技术。人工水封底板的最大缺点是工艺周期过长、尾液收集时间长、母液浓度低、实施条件苛刻、实施难度大、特别是难以对山体边坡的稳定性做出很好的控制，所以，在实际的采矿活动中，人工水封底板很少使用。
发明内容
本发明的目的是提供一种具有副巷道的原地浸取引流收液工艺，使矿前液大部分（80%以上）渗入工程控制面以下，以提高工程控制面以下贫矿层或无矿层的含水量，从而达到增加矿前液渗入贫矿或无矿带的比率而降低母液渗入地下的比率，从而达到提高稀土回收的目的。本工艺可降低母液的损失率，有利于稀土母液的回收，可减少环境污染问题，也可提高稀土回收率。
为实现本发明的目的，本发明提供了一种具有副巷道的原地浸取引流收液工艺，其特征在于：
1) 在矿体中设置多条集液巷道；
2) 在集液巷道两侧设置副巷道，通过压力梯度的交替改变，最终形成在集液巷道、副巷道及巷道之间的矿体组成的平面上形成多通道的母液引流收液控制工程面，其与改变含水率的贫矿或无矿带共同形成母液收集控制系统；
3) 在集液巷道中设置封堵墙，封堵墙前下部用导管连接至巷道口，导管在出口处用球阀开关控制；
4) 在检测操作或生产过程中，通过压力梯度的改变，在矿体与工程控制面之间组成的平面上形成高低压力梯度区，最终形成多通路的母液收集工程系统；
5）特定的收液条件下，可仅设置主巷道、副巷道，而不设置封堵墙及不对巷道底部进行防渗处理。
在本发明的技术方案中，根据矿体单探井品位情况及品位平面分布情况，结合水力学原理，设置集液巷道。所述集液巷道的位置依以下原则确定：
1) 集液巷道在矿体中的高度为矿体底部0.015%~0.02%之间；
2) 集液巷道沿山体走向布置；
3) 集液巷道的位置优选通过矿体品位好的部位。
然后，在集液巷道两侧设置副巷道，副巷道与集液巷道共同形成多通道的母液引流收液控制工程面。
在集液巷道中设置多个封堵墙，封堵墙为嵌入巷道四周的不透水墙，防止矿前液流出，使矿前液沿工程控制面下渗，封堵墙前后进行了预防巷道坍塌施工（支护柱）。在工作面往集液巷道口的方向每隔20～30米处设置一个封堵墙，直至距巷道口10米的距离为止，可设置多个封堵墙。封堵墙的位置可以在巷道支护柱前并与之相邻，这样可预防封堵墙坍塌。封堵墙可采用红砖砌嵌入巷道四周的方式设置。
封堵墙前部用防堵物料充填，下部用导管连接至集液巷道口，同时，还应注意做好巷道与导管的防堵措施。导管在出口处用球阀开关控制，球阀开关用于检测是否有母液，在检测操作或生产过程中，通过增加及释放压力在矿体与工程控制面之间形成高低压力梯度区，并最终形成多通路母液回收控制工程系统，其与改变含水率的贫矿或无矿带共同形成母液收集控制系统。所述封堵墙前下部导管在出口处用球阀开关，主要用途是控制矿前液下渗和母液的收集。所述防堵物料可以是柴草。所述导管可以是塑料盘管或PVC管。
在操作或生产过程中，每天（或根据其特点）对导管进行是否有母液的检查，目的是1、把矿前液尽可能地往工程控制面以下赶，降低在工程控制面处母液下渗能力；2通过交替改变巷道及巷道之间矿土的压力梯度，形成多通路的母液回收工程控制系统。当出现母液时放开球阀开关，此过程中形成的多通路、收液巷道及改变含水率的贫矿或无矿带共同形成母液收集系统；如没有母液则关闭球阀开关。需根据矿前液的特点灵活掌握每天检查次数，每天最多一次。通过多次检查，最终形成多通路母液回收控制面，该控制面与其下饱和或将近饱和的水封面一起，最终形成一个水封、高压力梯度的多母液引流通路的母液收集系统。
优选地，设置2～3条以沿山体走向或倾向为主，尽可能多地通过品位在平面上分布高的位置为辅的集液巷道很平缓，其坡度为1～2°，以有利于矿前液的下渗。
优选地，在特定的收液地质条件下，可不设置封堵墙，采用静压注浆法使大部分矿前液沿巷道之间的矿体渗入工程控制面以下形成水封底板。
优选地，多个集液巷道为间距15～20米的平行集液巷道。
更优选地，集液巷道和副巷道的截面都呈梯形，集液巷道的下底宽、上底宽分别为副巷道的1.4～1.6倍、集液巷道的高为副巷道的0.8～1.0倍。
优选地，集液巷道截面为下底宽1.2米，上底宽0.7米，高1.7米的梯形的集液巷道，副巷道的截面为下底宽0.8米，上底宽0.4米，高1.6～1.7米。
优选地，在集液巷道两侧设置副巷道，副巷道间的间隔5～10米，与集液巷道呈90°角或相互之间平行。
优选地，特殊收液地质条件下，集液巷道和副巷道底部可不进行防渗处理。
更优选地，集液巷道和副巷道底部采用稀释水泥浆对进行防渗处理。
优选地，在集液巷道中与巷道支护柱前并与之相邻的位置，采用红砖砌嵌入巷道四周设置封堵墙，特殊收液地质条件下，也可不设置封堵墙。
优选地，封堵墙前部用柴草塞满，其下部用1.5～3寸（内径5cm）塑料盘管或PVC管连接至巷道口。
优选地，在检测操作或生产过程中，多次对球阀开关的开关操作组合，形成了工程控制面与矿土的减小和增大压力梯度组合，通过增加及降低压力在矿体与工程控制面之间形成高低压力梯度区，最终形成了水封、高压力梯度的多通路的母液收集系统。
根据本发明的工艺，有效地利用了离子吸附型稀土原地浸取中的矿前液，在花岗岩风化壳或火山凝灰岩离子吸附型稀土矿矿土含有15%左右的水分，在实施原地浸取岩土工程静压注浆法注液时，被最先赶出来，称之为矿前液。本工艺使矿前液大部分（约80%以上）渗入贫矿及无矿层带，并通过减小及加大收液工程控制面与矿土之间的压力梯度交替操作，形成多通道的母液引流收液控制面，最终达到提高贫矿及无矿层带的含水量，阻止稀土母液下渗，减少了浸矿剂的用量，降低了母液的损失率。采用本发明工艺形成多通道母液回收控制面，有利于稀土母液的回收，减少了环境污染问题。理论及实际使用都证实，根据本发明的稀土资源回收率提高至少10%以上，即提高了稀土回收率。
附图说明
图1是根据本发明的集液巷道连接副巷道的巷道俯视图
具体实施方式
参见附图1，本发明技术方案的具体实施方法如下：根据矿体品位分布及水力学原理，在矿体中的高度为矿体底部0.015%~0.02%之间，以沿山体走向或倾向为主，尽可能多的通过品位在平面上分布高的位置为辅，设置集液巷道1，其坡度为1～2°。在集液巷道两侧间隔5～10米设置副巷道8，可以在巷道1底部实施水泥浆防渗措施。可在集液巷道1的两侧设置多个支护柱7。集液巷道1施工完后，每隔20～30米并在就近的支护柱7的前面实施封堵墙3，从而把集液巷道1分成若干段。底部用盘管或PVC管4联通至巷道口，以收集母液。由封堵墙3间隔出的每段集液巷道1都设有联通至巷道口的盘管或PVC管4。封堵墙3前面（远离球阀6的一侧）的巷道塞满防堵柴草5，进行防堵塞处理，在盘管或PVC管4出口处接球阀6开关。在检测操作或生产过程中，使矿前液沿集液巷道1及副巷道8形成的控制面处下渗，当有母液时才打开形成收液系统。通过释放压力在矿体与工程控制面之间形成高压力梯度，最终形成具有多通路的母液收集工程系统，其与改变含水率的贫矿或无矿带共同形成母液收集系统。

Claims (10)

  1. 一种具有副巷道的原地浸取引流收液工艺，其特征在于：1) 在矿体中设置多条集液巷道；2) 在集液巷道两侧设置副巷道，通过增加释放压力，最终形成在集液巷道、副巷道及巷道之间的矿土组成的平面上的多通道的母液引流收液控制工程面；3) 在集液巷道中设置封堵墙，封堵墙下部用导管连接至巷道口，导管在出口处用球阀开关控制；4) 在检测操作或生产过程中，通过压力梯度的改变，在矿体与工程控制面之间形成压力梯度的改变，最终形成多通路的母液收集工程系统，该系统与改变含水率的贫矿层或无矿层共同组成母液收集系统；5）特定的收液条件下，可仅设置主巷道、副巷道，而不设置封堵墙及不对巷道底部进行防渗处理。
  2. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：所述集液巷道的位置依以下原则确定：
    1) 集液巷道在矿体中的高度为在矿体底部0.015%~0.02%之间；
    2) 集液巷道沿山体走向布置；
    3) 集液巷道的位置为尽可能的通过矿体品位好的部位。
  3. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：所述集液巷道的坡度为1～2°，所述集液巷道为2～3条平行的、间距20～30米、沿山体走向或倾向的集液巷道。
  4. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：所述副巷道间的间隔5～10米，与集液巷道呈90°角或副巷道之间相互平行。
  5. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：所述集液巷道底部采用稀释水泥浆进行防渗处理。
  6. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：所述设置在集液巷道两侧的副巷道底部，采用稀释水泥浆进行防渗处理。
  7. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：所述封堵墙为嵌入巷道四周的不透水墙，封堵墙前后进行预防巷道坍塌施工。
  8. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：所述封堵墙前部用防堵物料充填，封堵墙下部集液管在巷道出口处用球阀开关控制矿前液下渗和母液的收集。
  9. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：多次对球阀开关的开关操作组合，形成在工程控制面处与矿土的减小和增大压力梯度组合，最终形成了水封、高压力梯度的多通路母液收集系统。
  10. 根据权利要求1所述的原地浸取引流收液工艺，其特征在于：集液巷道和副巷道的截面都呈梯形，集液巷道的下底宽、上底宽分别为副巷道的1.4～1.6倍、集液巷道的高为副巷道的0.8～1.0倍。
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