Kev tsim kho uas tsis yog grooving yog hais txog kev tsim kho ntawm kev tso lossis nchuav cov kav dej (drains) hauv qhov uas tau khawb hauv qab av raws covcov kav dej.Muaj cov yeeb nkab jacking txoj kev, thaiv txoj kev tunneling, ntiav burying txoj kev, directional drilling txoj kev, ramming yeeb nkab txoj kev, thiab lwm yam.

(1) Kaw yeeb nkab jacking:

Qhov zoo: kev tsim kho siab raug.Disadvantages: tus nqi siab.

Scope ntawm daim ntawv thov: dej mov thiab dej pipelines, integrated pipelines: siv pipelines.

Siv tau txoj kab uas hla: 300-4000m.Kev tsim kho raug: tsawg dua±50 hli.Kev tsim kho nrug: ntev dua.

Siv tau geology: ntau yam av txheej.

(2) Txoj kev tiv thaiv

Qhov zoo: kev tsim kho ceev ceev.Disadvantages: tus nqi siab.

Scope ntawm daim ntawv thov: cov dej xa dej thiab cov kav dej, cov kav dej sib xyaw ua ke.

Siv tau txoj kab uas hla: saum 3000m.Kev tsim kho raug: uncontrolled.Kev tsim kho nrug: ntev.

Siv tau geology: ntau yam av txheej.

(3) Pem hauv ntej faus kev tsim yeeb nkab (tunnel) txoj kev

Qhov zoo: muaj zog siv tau.Qhov tsis zoo: kev tsim kho qeeb qeeb thiab tus nqi siab.

Scope ntawm daim ntawv thov: cov dej xa dej thiab cov kav dej, cov kav dej sib xyaw ua ke.

Siv tau txoj kab uas hla: saum 1000mm.Kev tsim kho raug: tsawg dua lossis sib npaug li 30mm.Kev tsim kho nrug: ntev dua.

Siv tau geology: ntau yam formations.

(4) Kev taw qhia drilling

Qhov zoo: kev tsim kho ceev ceev.Disadvantages: tsawg tswj qhov tseeb.

Scope ntawm daim ntawv thov: saj zawg zog kav.

Siv cov yeeb nkab txoj kab uas hla: 300mm—1000 hli.Kev tsim kho raug: tsis pub ntau tshaj 0.5 npaug ntawm cov yeeb nkab sab hauv txoj kab uas hla.Kev tsim kho nrug: luv dua.

Siv tau geology: Tsis muaj feem xyuam rau cov xuab zeb, pebble, thiab dej-txias strata.

(5) Tamping tube txoj kev

Qhov zoo: kev tsim kho ceev ceev thiab tus nqi qis dua.Disadvantages: tsawg tswj qhov tseeb.

Scope ntawm daim ntawv thov: steel yeeb nkab.

Siv cov yeeb nkab txoj kab uas hla: 200mm—1800 hli.Kev tsim kho raug: uncontrolled.Kev tsim kho nrug: luv.

Siv tau geology: dej-bearing stratum tsis haum, xuab zeb thiab pebble stratum nyuaj.