A roof-bolt drill bit, comprising: a bit body (522, 622) rotatable about a central axis (548, 648), the bit body comprising: a forward end (524, 624); a rearward end (526, 626) axially spaced away from the forward end; two cutting element support structures (562, 662), each of the two cutting element support structures comprising a mounting surface (531, 631) and a trailing support surface (565, 665); an internal passage defined within the bit body, the internal passage extending from a rearward opening (521, 621) defined in the rearward end of the bit body through at least a portion of the bit body; a threaded coupling portion (591, 691) located adjacent the rearward end; two cutting elements (528, 628) coupled to the bit body, each of the two cutting elements comprising: a cutting face (540, 640); a cutting edge adjacent to the cutting face; a trailing surface (544, 644) spaced away from the cutting face, the trailing surface being fixed to the mounting surface of a corresponding cutting element support structure of the two cutting element support structures; wherein: a fluid port (576, 676) is defined within each of the two cutting element support structures between the mounting surface and the trailing support surface of the corresponding cutting element support structure, each of the fluid ports extending from the internal passage to a port opening defined in the corresponding cutting element support structure; each of the fluid ports is configured to direct fluid from each of the port openings in a direction (582, 682) that forms an angle (θ 1, θ 2) with respect to a forward direction of the central axis. a bit body (522, 622) rotatable about a central axis (548, 648), the bit body comprising: a forward end (524, 624); a rearward end (526, 626) axially spaced away from the forward end; two cutting element support structures (562, 662), each of the two cutting element support structures comprising a mounting surface (531, 631) and a trailing support surface (565, 665); an internal passage defined within the bit body, the internal passage extending from a rearward opening (521, 621) defined in the rearward end of the bit body through at least a portion of the bit body; a forward end (524, 624); a rearward end (526, 626) axially spaced away from the forward end; two cutting element support structures (562, 662), each of the two cutting element support structures comprising a mounting surface (531, 631) and a trailing support surface (565, 665); an internal passage defined within the bit body, the internal passage extending from a rearward opening (521, 621) defined in the rearward end of the bit body through at least a portion of the bit body; a threaded coupling portion (591, 691) located adjacent the rearward end; two cutting elements (528, 628) coupled to the bit body, each of the two cutting elements comprising: a cutting face (540, 640); a cutting edge adjacent to the cutting face; a trailing surface (544, 644) spaced away from the cutting face, the trailing surface being fixed to the mounting surface of a corresponding cutting element support structure of the two cutting element support structures; a cutting face (540, 640); a cutting edge adjacent to the cutting face; a trailing surface (544, 644) spaced away from the cutting face, the trailing surface being fixed to the mounting surface of a corresponding cutting element support structure of the two cutting element support structures; wherein: a fluid port (576, 676) is defined within each of the two cutting element support structures between the mounting surface and the trailing support surface of the corresponding cutting element support structure, each of the fluid ports extending from the internal passage to a port opening defined in the corresponding cutting element support structure; a fluid port (576, 676) is defined within each of the two cutting element support structures between the mounting surface and the trailing support surface of the corresponding cutting element support structure, each of the fluid ports extending from the internal passage to a port opening defined in the corresponding cutting element support structure;